Murakami WSR Dual Cure Screen Printing Emulsion – High-Solids Dual Cure Emulsion for Water-Based, Discharge, HSA & Plastisol Inks

Murakami

Murakami WSR Dual Cure Screen Printing Emulsion - High-Solids Dual Cure Emulsion for Water-Based, Discharge, HSA & Plastisol Inks

Murakami Photocure WSR is a high-performance dual-cure direct emulsion engineered for textile printing applications requiring durability, precision, and broad ink compatibility. Per Murakami’s TDS — suitable for HSA (high solid acrylic) inks, conventional water-based ink, and plastisol ink. With 44% solids and 17,000 mPa·s viscosity, WSR builds strong, flat stencils with low surface roughness (low Rz value) for improved print precision. The dual-cure chemistry delivers wide exposure latitude AND strong solvent resistance against the chemicals commonly used in press cleanup (kerosene, turpentine, methanol, butylcellosolve, citrus cleaners). High resolution for fine images. Reclaimable.

Dual-Cure Technology
Combines diazo sensitizer with photopolymer chemistry. Comes with diazo packet included — mix once, get the best of both worlds: wide exposure latitude plus durability against aggressive inks.
Solvent Resistant (Per TDS Testing)
Per Murakami TDS — suitable for HSA inks and resistant against solvents used during the cleaning process. WSR is rated EXCELLENT against water, kerosene, turpentine oil, methanol, butylcellosolve, and citrus-based chemicals. See the full solvent resistance table in the Technical Specs tab.
Multi-Ink Compatibility
Per Murakami TDS — designed for water-based, discharge, high solid acrylic (HSA), and plastisol ink systems. One emulsion handles the full textile ink range.
44% Solids & 17,000 mPa·s Viscosity
Per Murakami TDS — high solid contents and high viscosity provide excellent coating performance and a flat stencil surface with low Rz value (low surface roughness). Same solids and viscosity profile as T9 Pink, with dual-cure chemistry added.
Outstanding Resolution & Definition
Per Murakami TDS — high resolution emulsion for reproduction of detailed and fine images. Holds halftones, fine lines, and intricate artwork cleanly.
Easy Reclaiming
Per Murakami TDS — possible to reclaim. The dual-cure chemistry doesn’t lock the stencil into the mesh permanently, letting you reuse screens efficiently while preserving fine mesh counts.
Same-day shipping · In stock at our San Antonio, TX warehouse · FREE shipping on orders over $200 · Order by 3:30 PM CT

Price range: $34.99 through $3,500.00

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Description

Murakami Photocure WSR Emulsion

The Solvent-Resistant Dual-Cure for Demanding Textile Production

Murakami Photocure WSR is a high-performance dual-cure direct emulsion engineered for textile printing applications requiring durability, precision, and broad ink compatibility. Per Murakami’s TDS — suitable for HSA (high solid acrylic) inks, conventional water-based ink, and plastisol ink. With 44% solids and 17,000 mPa·s viscosity, WSR builds strong, flat stencils with low surface roughness (low Rz value) for improved print precision. The dual-cure chemistry delivers wide exposure latitude AND strong solvent resistance against the chemicals commonly used in press cleanup (kerosene, turpentine, methanol, butylcellosolve, citrus cleaners). High resolution for fine images. Reclaimable.

Dual-cure (solvent-resistant)
44% solids, blue color
Diazo packet included — mix at first use

Key Features & Benefits

Dual-Cure Technology
Combines diazo sensitizer with photopolymer chemistry. Comes with diazo packet included — mix once, get the best of both worlds: wide exposure latitude plus durability against aggressive inks.
Solvent Resistant (Per TDS Testing)
Per Murakami TDS — suitable for HSA inks and resistant against solvents used during the cleaning process. WSR is rated EXCELLENT against water, kerosene, turpentine oil, methanol, butylcellosolve, and citrus-based chemicals. See the full solvent resistance table in the Technical Specs tab.
Multi-Ink Compatibility
Per Murakami TDS — designed for water-based, discharge, high solid acrylic (HSA), and plastisol ink systems. One emulsion handles the full textile ink range.
44% Solids & 17,000 mPa·s Viscosity
Per Murakami TDS — high solid contents and high viscosity provide excellent coating performance and a flat stencil surface with low Rz value (low surface roughness). Same solids and viscosity profile as T9 Pink, with dual-cure chemistry added.
Outstanding Resolution & Definition
Per Murakami TDS — high resolution emulsion for reproduction of detailed and fine images. Holds halftones, fine lines, and intricate artwork cleanly.
Easy Reclaiming
Per Murakami TDS — possible to reclaim. The dual-cure chemistry doesn’t lock the stencil into the mesh permanently, letting you reuse screens efficiently while preserving fine mesh counts.
Flat Surface, Low Rz Value
The high-viscosity formulation produces a flat coated surface with low surface roughness (low Rz value per Murakami TDS), which translates to sharper printed edges and better ink release on press.
Wide Exposure Latitude
Dual-cure chemistry provides wider exposure latitude than pure photopolymer. More forgiving of light source variation, coating thickness, and screen prep — easier to dial in consistently across batches.

What Is a Dual-Cure Emulsion?

Screen printing emulsions come in three main chemistry types: diazo (slower exposure, requires mixing a sensitizer powder at first use, broader ink compatibility), photopolymer / PVA-SBQ (faster exposure, pre-sensitized, sometimes narrower ink compatibility), and dual-cure — which combines both chemistries to get the benefits of each. Murakami Photocure WSR is a dual-cure emulsion.

Dual-cure emulsions ship unsensitized with a packet of diazo sensitizer included in the box. You mix the diazo into the emulsion at first use (one-time step), then coat, expose, develop, and print as normal. The dual chemistry gives you wider exposure latitude (more forgiving of light source variation), better resistance to aggressive ink chemistry, and superior stencil durability — all while still working with plastisol, UV, solvent, and (with hardener) water-based inks.

Why dual-cure for graphic, industrial & aggressive-ink work?
UV-curable inks, solvent-based inks, and aggressive plastisol formulations can break down standard photopolymer emulsions during long print runs. The diazo component of dual-cure emulsions provides extra chemistry resistance that pure PVA-SBQ photopolymer doesn’t match. That’s why dual-cure is the standard choice for graphic, industrial, decal, and CD/DVD printing applications — the workloads that demand maximum stencil durability across multiple ink types. For water-based and discharge work, pair with Murakami MS Hardener for the required water resistance.

The Full Murakami Emulsion Lineup at River City Supply

Murakami makes ten different emulsions for different screen-printing needs. Murakami Photocure WSR is one option in the lineup — but other Murakami emulsions may fit specific workflows better. Use this chart to compare:

EmulsionTypeColorSolidsInk CompatibilitySensitizingBest For
Photocure ProDual-cure (diazo + photopolymer)Blue38%Water-based, discharge, plastisol, solvent, UVDiazo packet included — mix at first useVersatility — one emulsion for every ink type
Photocure BLUPVA-SBQ pure photopolymerBlue41%Plastisol, discharge, water-based textilePre-sensitized — ready to useMulti-ink production, blue color preference
Photocure SRPVA-SBQ pure photopolymer (solvent-resistant)Magenta37%UV, solvent, textile (plastisol); also backs capillary filmsPre-sensitized — ready to useSolvent/UV ink work + capillary film backing
T9 PinkPVA-SBQ pure photopolymerPink44%Water-based, discharge, HSA, plastisolPre-sensitized — ready to useMulti-ink, 44% solids, 17,000 mPa·s viscosity
T9 VioletPVA-SBQ pure photopolymerViolet44%Water-based, discharge, HSA, plastisolPre-sensitized — ready to useSame as T9 Pink, violet color preference
TXRPVA-SBQ pure photopolymerPink41%Water-based, discharge, HSA, plastisolPre-sensitized — ready to useVersatility, fast exposure, fine detail
Aquasol HVPVA-SBQ pure photopolymer (high-viscosity)Blue42%Water-based, discharge, plastisolPre-sensitized — ready to useThick stencils, heavy ink deposit, fast exposure
Aquasol HVP PinkPVA-SBQ pure photopolymer (high-viscosity)Pink42%Water-based, discharge, plastisolPre-sensitized — ready to useThick stencils, pink color preference
Aquasol HS3SBQ-Type one-pot (water-resistant)Blue49%Water-based, discharge, plastisolPre-sensitized — ready to useHighest solids (49%), thick high-EOM water-based prints
SP 1400DiazoBlue42%Plastisol, discharge, HSA, water-based textileDiazo packet — mix at first useTraditional diazo workflow, long stencil life, easy reclaim
SP 9500Dual-cure (diazo + photopolymer)Green36%UV, solvent, plastisol, water-based (with hardener)Diazo packet included — mix at first useGraphic/industrial dual-cure for UV & solvent ink durability
★ This Product
Photocure WSR		Dual-cure (diazo + photopolymer)Blue44%Water-based, discharge, HSA, plastisolDiazo packet included — mix at first useSolvent-resistant dual-cure for textile + HSA work
Not sure which Murakami emulsion is right for you?
Call (512) 454-0505 and tell us what inks you’re running, your typical print run length, and whether you want pre-sensitized convenience or diazo flexibility. We’ll match you to the right emulsion for your shop’s workflow — not just sell you the most expensive option.

What Murakami Photocure WSR Is Used For

Murakami Photocure WSR is engineered for shops where pre-sensitized convenience, fast exposure, and reliable multi-ink performance matter. If you’re in one of these categories, this is the right choice:

Discharge Ink Printing
Discharge inks are aggressive on emulsion. WSR’s dual-cure chemistry plus solvent resistance handles discharge runs better than pure SBQ photopolymer alternatives, with the option to add Murakami hardener for extended runs.
High Solid Acrylic (HSA) Inks
Per Murakami TDS — WSR is specifically suitable for HSA inks. Not every emulsion handles HSA chemistry; WSR does, plus the solvent resistance handles the cleanup.
Water-Based Textile Printing
Per Murakami TDS, WSR handles conventional water-based ink. The dual-cure chemistry provides better water resistance than pure SBQ photopolymer. For extended runs over 200 impressions, pair with Murakami MS Hardener for additional durability.
Shops Using Aggressive Press Cleanup
Per Murakami TDS, WSR is excellent against kerosene, turpentine, methanol, butylcellosolve, and citrus-based chemicals. If your shop’s press wash chemistry is breaking down standard photopolymer emulsions, WSR is built for that environment.
Plastisol Production
Plastisol ready after the diazo mixing step. The dual-cure durability extends stencil life on long automated press runs vs pure SBQ photopolymer alternatives.
Garment & Specialty Textile Printing
Per Murakami TDS — suitable for T-shirt, textile, and wide range of industries. The high-resolution + dual-cure combination handles demanding garment printing requirements where stencil quality directly affects print quality.
Fine Detail & Halftone Textile Work
Per Murakami TDS — high resolution for detailed and fine image reproduction. The low Rz value (flat surface) holds halftones cleanly without dot gain or detail loss.
Shops Needing One Emulsion for Multiple Ink Types
WSR’s broad ink compatibility (water-based + discharge + HSA + plastisol) plus solvent resistance means one emulsion inventory line covers mixed-ink production schedules. No swapping emulsions for different jobs.

How to Mix the Diazo Sensitizer (First-Time Use)

Murakami Photocure WSR ships unsensitized with a packet of diazo sensitizer included in the box. The diazo is kept separate because it has a shorter shelf life once mixed into the emulsion. Mixing is a one-time step performed when you open a new container — after that, the sensitized emulsion is ready for normal scoop-coater application.

⚠ Sensitized shelf life is limited: Per Murakami’s TDS, sensitized Murakami Photocure WSR should be used within 1 week (per TDS — significantly shorter than other dual-cure emulsions) at room temperature. Refrigeration at ~40°F adds usable life. If your shop uses Murakami Photocure WSR slowly, keep the unsensitized container on the shelf and only mix what you’ll use in that window.
1
Mix the Diazo Sensitizer
Per Murakami TDS — dissolve the provided diazo with 10% water of emulsion volume. Do not use warm water — cold or room-temperature distilled water only. Cap and shake until the diazo is fully dissolved (cloudy/yellow with no visible particles). Mix the dissolved diazo solution into the emulsion thoroughly.
2
Pour the Diazo Solution Into the Emulsion
Per Murakami TDS — pour the entire diazo solution into the emulsion container and mix thoroughly. Work under yellow safelights once the diazo is added — the emulsion becomes fully light-sensitive at this point.
3
Let Settle 1 Day (or Filter for Immediate Use)
Per Murakami TDS — let the mixed emulsion settle for one day before using to allow air bubbles to rise out. For immediate use, filter the sensitized emulsion through 100/cm (250/inch) or higher mesh to remove bubbles. The filter shortcut works in a pinch, but the overnight settle gives cleaner stencils with fewer pinholes.
4
Label the Container With Mix Date
Write the date sensitized on the container with a permanent marker. Per Murakami’s TDS: use sensitized Murakami Photocure WSR within 1 week (per TDS — significantly shorter than other dual-cure emulsions). Refrigeration extends usable life. Knowing the date prevents using stale emulsion.

Step-by-Step: Coating & Exposing Murakami Photocure WSR

Murakami Photocure WSR ships unsensitized with a diazo packet that you mix once at first use (see section above). Once sensitized, the emulsion coats, exposes, develops, and prints like any standard scoop-coater emulsion.

1
Degrease the Mesh
Apply mesh degreaser to both sides of the screen and work into a lather with a soft brush. Rinse thoroughly with clean water and allow the screen to dry completely before coating. Murakami 801 Screen Degreaser is the recommended chemistry per the TDS. A properly degreased mesh is the foundation of every successful stencil.
2
Set Up Your Coating Station Under Yellow Safelight
Per Murakami TDS — work under yellow safelights. Avoid exposure to sunlight, fluorescent, and incandescent lights. Set the screen on a stable surface at a slight upward angle.
3
Coat the Print Side
Per Murakami TDS — use a clean dry coating trough that has a nick-free surface for smooth coating. Pour an ample amount of Murakami Photocure WSR into the scoop coater. Apply one or two coats of emulsion to the print side. Aim for full uniform coverage with no streaks, gaps, or visible mesh through the emulsion.
4
Flip Screen, Coat the Squeegee Side
Per Murakami TDS — rotate the frame 180 degrees and apply one or two coats of emulsion to the squeegee side. Additional coats may be added to the print side if thicker stencils are required.
5
Dry Flat With Print Side Down
Per Murakami TDS — dry the coated screen horizontally with the print side DOWN in a clean light-safe area. Target Up to 104°F (40°C) per TDS and 30-50% relative humidity with good air circulation. A screen drying cabinet with heated airflow holds these conditions reliably.
6
Position Your Film Positive
Place the film positive on the PRINT SIDE of the screen with the emulsion side of the positive in direct contact with the emulsion. Lock down with vacuum (preferred) or weighted glass — no air gaps, no light leaks. Per Murakami TDS, clean the film positives and vacuum frame glass prior to exposure to minimize pinholes.
7
Expose to UV Light
Expose using a metal halide or LED UV exposure unit. Per Murakami TDS, exposure is affected by mesh color, emulsion type, coating thickness, lamp type, and bulb age — see the Technical Specs tab for the TDS exposure data table as a starting point. Run a 21-step Stouffer wedge test on your first screen to dial in your shop’s optimal time.
8
Wash Out the Stencil
Per Murakami TDS — gently spray both sides of the screen with lukewarm water, wait a few seconds to allow emulsion to soften, then wash the print side of the screen until the image is fully open. Rinse both sides thoroughly. Don’t use high-pressure water — it can damage fine detail.
9
Dry the Developed Screen
Allow the developed screen to dry completely before printing. A fan or warm drying cabinet (under 104°F / 40°C) speeds drying. Once dry, you can spot-touch any small pinholes with blockout — Murakami 901 Blockout Red is ideal for this. The screen is now ready for press.

Having an Emulsion Problem? Free Troubleshooting Guide

Every screen-printer runs into emulsion problems eventually — pinholes, washout failures, sawtooth edges, fish eyes, stencils breaking down mid-run. We’ve put together a comprehensive troubleshooting guide organized by symptom so you can find your issue fast and get back to printing.

River City Supply Free Resource
The Complete Screen Printing Emulsion Troubleshooting Guide
19 specific emulsion issues across 5 workflow stages (coating, exposure, washout, on-press, reclaim). Quick diagnostic table at top so you can triage fast. Prevention checklist so you stop the problem from coming back.

View Troubleshooting Guide →

8 Pro Tips for Murakami Photocure WSR

Distilled from Murakami’s TDS, professional shop experience, and our customer feedback. Save yourself the trial and error:

1
Mix Diazo with EXACTLY 10% Water of Emulsion Volume
Per Murakami TDS — dissolve the provided diazo with 10% water of emulsion volume. Do not use warm water. Cold or room-temperature distilled water only. Mix the dissolved diazo solution into the emulsion thoroughly.
2
Let Settle 1 Day Before Use (or Filter for Immediate Use)
Per Murakami TDS — let the mixed emulsion settle for one day before using to allow air bubbles to rise out. For immediate use, filter the sensitized emulsion through 100/cm or higher mesh to remove bubbles. The filter step is faster but the overnight settle gives cleaner stencils.
3
Sensitized Emulsion Only Lasts 1 Week
Per Murakami TDS — use mixed (sensitized) emulsion within 1 week. This is significantly shorter than the 2-3 week pot life of SP-1400 or SP-9500. Plan your mixing volume around expected weekly throughput; don’t mix more than you’ll use in 7 days.
4
Keep Sensitized Emulsion Cool and UV-Safe
Per Murakami TDS — keep the mixed emulsion in a cool, UV-light-safe area. Even within the 1-week window, heat and light shorten effective life and degrade exposure performance.
5
Filter Emulsion Before Returning to Container
Per Murakami TDS — filter the emulsion with screen mesh before returning it from the coating trough to the container. Removes dust, foreign substances, and air bubbles that would cause coating defects in the next batch.
6
Drying Temperature Up to 104°F (40°C)
Per Murakami TDS — dry the coated screen completely at temperatures up to 40°C (104°F) before exposure. Higher temperatures pre-cure the emulsion and damage stencil quality.
7
Avoid Propylene Glycol, NMP, and Dimethylformamide
Per Murakami TDS solvent rating table — WSR is NOT compatible with propylene glycol, N-Methyl Pyrrolidone (NMP), or dimethylformamide. Check your press cleanup chemistry against the solvent resistance table in the Specs tab before purchasing.
8
Use Hardener for Maximum Water-Based Run Life
Per Murakami TDS, WSR handles water-based and discharge inks on its own. For runs over 200 impressions, applying Murakami MS Hardener after exposure dramatically extends stencil life. The hardener is reclaimable when proper procedures are followed.

Pair Murakami Photocure WSR With Murakami MS Hardener for Extended Runs

For water-based and discharge work running over a few hundred impressions, the stencil will gradually break down as the aqueous ink chemistry attacks the emulsion. Murakami MS Hardener is a post-exposure treatment that dramatically extends stencil life by cross-linking the cured emulsion for greater water, solvent, and abrasion resistance.

★ Murakami MS Emulsion Reclaimable Hardener

Applied after exposure, development, and blockout using a scoop coater on both sides. Cured in direct sunlight or a 100°F hot box. Compatible with diazo, dual-cure, and SBQ photopolymer emulsions across all major brands — so it works with Murakami Photocure WSR and every other Murakami emulsion.

Key benefit: Unlike permanent hardeners, MS Hardener is RECLAIMABLE when proper procedures are followed — meaning you don’t lose your screen inventory to the treatment. Ideal for water-based, discharge, and aggressive plastisol printing.

View MS Hardener →

Note on Hardener A&B: Murakami also sells a two-part Hardener A&B for maximum durability. Per the Murakami TDS, stencils treated with Hardener A&B will NOT be reclaimable. View Hardener A&B →

Storage & Shelf Life

Unsensitized Murakami Photocure WSR
  • At least 1 year at room temperature (per Murakami TDS). Sensitized emulsion: use within 1 week per Murakami TDS.
  • Store in original container, lid tight
  • Cool, dry, UV-light-safe area
  • Avoid temperature swings
Coated Screens
  • Up to 1 month at 59-77°F (15-25°C), 30-50% relative humidity, in total darkness
  • Total darkness required — no light leaks
  • Cool, dry environment
  • Stack with frames separated
Working Conditions
  • Yellow safelight (per Murakami TDS)
  • AVOID sunlight, fluorescent, incandescent
  • Drying temp: Up to 104°F (40°C) per TDS
  • Humidity: 30-50% relative humidity

Other Murakami Emulsions & Accessories

If Murakami Photocure WSR isn’t quite the right fit, here are the other Murakami emulsions we stock — plus the accessories that pair with the Murakami Photocure WSR workflow:

Murakami Photocure Pro

Dual-cure flagship. Diazo + photopolymer chemistry, 38% solids, blue. Compatible with water-based, discharge, plastisol, solvent, and UV inks. Diazo packet included.

View product →

Murakami Photocure BLU

Blue PVA-SBQ pure photopolymer at 41% solids. Pre-sensitized, fast exposure, multi-ink (plastisol, discharge, water-based textile with hardener). The textile production workhorse.

View product →

Murakami T9 Pink

Pre-sensitized SBQ photopolymer — no diazo mixing required. Fast exposure (3-5× faster than diazo), pink color for visibility, multi-ink compatibility.

View product →

Murakami T9 Violet

Same chemistry as T9 Pink, violet color. Some printers prefer violet visibility under their specific safelight conditions.

View product →

Murakami TXR Pink

Pre-sensitized PVA-SBQ photopolymer with 41% solids. Fast exposure, fine detail capability, multi-ink compatibility.

View product →

Murakami Aquasol HV

High-viscosity SBQ photopolymer for thicker stencil builds. Blue color, fast exposure. For shops needing heavier ink deposit.

View product →

Murakami Aquasol HVP Pink

High-viscosity SBQ in pink. Same advantages as Aquasol HV with the pink color preference. 42% solids for very heavy stencil builds.

View product →

Murakami Aquasol HS3

SBQ one-pot emulsion specifically engineered for thick EOM (high emulsion over mesh) prints. Water-resistant out of the can.

View product →

Murakami SP 1400

Traditional diazo emulsion in blue. 42% solids. For shops wanting the classic diazo workflow with Murakami quality.

View product →

Murakami SP 9500

Dual-cure green emulsion for UV, solvent, and plastisol inks. 36% solids. Graphic/industrial workhorse with wide exposure latitude and aggressive ink resistance.

View product →

Murakami Photocure SR

Solvent/UV/plastisol photopolymer emulsion. For specialty solvent ink work and UV-curable inks that need an emulsion engineered for those chemistries.

View product →

Murakami MS Hardener

Post-exposure stencil hardener. Works with all Murakami emulsions. Reclaimable when proper procedures are followed. For extended water-based and discharge runs.

View product →

Murakami 901 Blockout Red

Fast-drying screen blockout for masking. Red color for visibility against blue stencils. Essential for touching up pinholes and masking off frame edges.

View product →

FREE SHIPPING ON ORDERS OVER $200
In stock at our San Antonio, TX warehouse

Orders placed before 3:30 PM CT ship same business day. Most US destinations receive in 2-5 business days. Need help choosing the right emulsion or troubleshooting an existing stencil? Call us — we’ve helped hundreds of shops dial in their screen-making process.

Call (512) 454-0505

Technical Specifications

Product Identification

SpecificationValue
Product NameMurakami Photocure WSR Emulsion
SKUMUR WSR
ManufacturerMurakami Screen USA
CategoryDirect screen printing emulsion (Dual-cure (solvent-resistant))
Chemistry TypeDual-cure (diazo + photopolymer)
ColorBlue
Shipping OriginSame-day from RCS San Antonio, TX (orders by 3:30 PM CT)

Physical Specifications

PropertyValue
Solids Content44% (per Murakami TDS)
ViscosityApprox. 17,000 mPa·s at 25°C
SensitizingDiazo packet included — mix at first use
Exposure Speed3-5× faster than diazo emulsions (per Murakami TDS)
Surface QualityVirtually pin-hole and fish-eye free (per Murakami TDS)
Hardener CompatibilityCompatible with Murakami MS Hardener (reclaimable) and Hardener A&B (non-reclaimable)

Ink Compatibility

Ink TypeCompatibility & Notes
Water-based★ Compatible — pair with Murakami MS Hardener for runs over 200 impressions.
Discharge★ Compatible — pair with Murakami MS Hardener for runs over 200 impressions.
HSA (High Solid Acrylic)★ Compatible — per Murakami TDS, rated for High Solid Acrylic ink systems.
Plastisol★ Excellent — ready to use, no special considerations.

Exposure Data (Per Murakami TDS)

Light source for these times: 3kW Metal Halide lamp (UV42 intensity: 12 mW/cm²)

Mesh / ColorEOMExposure Time
Polyester 31/cm (80/inch) White35µm (P↑↑ S↑↑)180-210 sec
Polyester 59/cm (150/inch) White10µm (P↑ S↑)45-60 sec
Polyester 59/cm (150/inch) White15µm (P↑ S↑↑)60-90 sec
Polyester 100/cm (250/inch) Yellow15µm (P↑↑ S↑↑)60-90 sec

Note: Per Murakami TDS — exposure is affected by mesh color, emulsion type, coating thickness, lamp type, and bulb age. Use these times as a starting point. Run a 21-step Stouffer wedge test on your first screen to dial in your shop’s optimal exposure.

Solvent & Chemical Resistance (Per Murakami TDS)

Per Murakami’s TDS, Murakami Photocure WSR was tested for resistance against common screen-printing solvents and cleaning chemicals using a 24-hour absorption test. Use this table to verify Murakami Photocure WSR is compatible with the press cleanup chemistry your shop uses.

Chemical / SolventResistance RatingNotes / Common Use
Water◎ ExcellentUniversal — baseline for all water-based ink and washout chemistry.
Kerosene◎ ExcellentCommon screen-printing press wash solvent. WSR holds up to repeated cleanup cycles.
Turpentine Oil◎ ExcellentTraditional press wash, ink thinner, and screen cleanup solvent.
Methanol◎ ExcellentAlcohol-based screen cleaner, common in industrial cleanup.
Butylcellosolve◎ ExcellentGlycol ether used in industrial cleaners and ink reducers.
Citrus-based chemical◎ ExcellentCitrus-based degreasers and screen cleaners (orange oil, d-limonene).
Isopropyl Alcohol○ GoodCommon screen-prep degreaser. Use with reasonable care; not for prolonged contact.
Xylene○ GoodSolvent ink reducer and cleaner. Use with reasonable care; avoid extended soaking.
Propylene glycol× Not recommendedWill damage stencil over time. Avoid as cleanup solvent.
N-Methyl Pyrrolidone (NMP)× Not recommendedAggressive industrial solvent. WSR is not compatible — use alternative chemistry.
Dimethylformamide× Not recommendedAggressive industrial solvent. WSR is not compatible — use alternative chemistry.

Rating legend per Murakami TDS: ◎ Excellent = full compatibility (TDS symbol “° ≅”); ○ Good = use with reasonable care (TDS symbol “°”); × Not recommended = will damage stencil over time. Test results based on 24-hour absorption per Murakami’s published TDS data.

Available Sizes

SizeBest For
QuartFirst-time users testing Murakami Photocure WSR; very low-volume shops
1 GallonSmall/hobby shops, casual users, monthly emulsion turnover
5 Gallons★ Most popular — Production shops, weekly screen-making cycles
50 GallonsHigh-volume production facilities, contract printers, multi-line shops

Shelf Life Summary

ConditionShelf Life
Emulsion (sealed, room temp)At least 1 year at room temperature (per Murakami TDS). Sensitized emulsion: use within 1 week per Murakami TDS.
Coated screens (unexposed)Up to 1 month at 59-77°F (15-25°C), 30-50% relative humidity, in total darkness
Coated screens (exposed)Indefinite — exposed/cured stencils are stable

Technical Sheets / Safety Data Sheets / Documents

Official manufacturer documentation for Murakami Photocure WSR Emulsion. Both documents open in a new tab.

Photocure WSR Technical Data Sheet

Murakami’s official TDS for Photocure WSR. Includes dual-cure mixing instructions (dissolve diazo with 10% water of emulsion volume, no warm water), 24-hour absorption solvent rating table, exposure data for multiple mesh counts (3kW Metal Halide at 12 mW/cm² UV42 intensity), 44% solids and 17,000 mPa·s viscosity specifications.

Photocure WSR Technical Data Sheet

Photocure WSR Safety Data Sheet

Murakami’s official GHS-compliant SDS for Photocure WSR (2016 revision). Covers chemistry composition (including diazo sensitizer), hazard identification, handling, storage, first aid, exposure controls, and disposal.

Photocure WSR Safety Data Sheet

For additional product information, technical bulletins, and the full Murakami emulsion catalog, visit Murakami Screen USA → · Have a question about specifications or application? Call us at (512) 454-0505.

FREQUENTLY ASKED QUESTIONS

Frequently Asked Questions

What does “dual-cure” mean for Murakami Photocure WSR?
Dual-cure means the emulsion uses BOTH diazo sensitizer chemistry AND photopolymer chemistry together. Pure diazo emulsions cure slowly but resist a wide range of inks. Pure photopolymer emulsions cure quickly but can break down in aggressive ink chemistry. Dual-cure emulsions like Murakami Photocure WSR combine both — you get the faster cure of photopolymer with the broader ink compatibility and chemistry resistance of diazo. The trade-off: you have to mix the diazo packet at first use, and the sensitized emulsion has a limited shelf life.
Why does the diazo packet come separate from the emulsion?
Diazo sensitizer has a much shorter shelf life than the emulsion base. By shipping them separately, Murakami guarantees at least 1 year of unsensitized shelf life. Per the TDS, once mixed, use the sensitized emulsion within 1 week (per TDS — significantly shorter than other dual-cure emulsions) — refrigeration can extend usable life. If they shipped pre-mixed, you’d be opening a container that started its shelf-life clock months ago at the factory.
How does Murakami Photocure WSR compare to other Murakami dual-cure and SBQ emulsions?
See the comparison chart in the Description tab. Quick version: Murakami Photocure WSR is dual-cure (mix diazo at first use, broad ink compatibility). Other Murakami dual-cure emulsions include Photocure Pro (textile/water-based focus), SP-9500 (UV/solvent/CD focus), and WSR (solvent-resistant textile focus). PVA-SBQ emulsions like Photocure SR, BLU, T9, Aquasol HV/HVP, and TXR are pre-sensitized (no mixing, faster exposure) but with narrower ink compatibility. Choose the dual-cure that matches your primary ink workload.
How long does mixed (sensitized) Murakami Photocure WSR last?
Per Murakami’s TDS, use sensitized Murakami Photocure WSR within 1 week (per TDS — significantly shorter than other dual-cure emulsions) at room temperature. Refrigeration at ~40°F can extend usable life. Always label the container with the mix date. If your shop uses Murakami Photocure WSR slowly, keep the unsensitized container on the shelf and only mix smaller portions as needed to avoid waste.
Do I need to use a hardener with Murakami Photocure WSR?
Not always. Per Murakami’s TDS, Murakami Photocure WSR is suitable for water-based and discharge inks WHEN HARDENED with Murakami MS Hardener or Hardener A&B. Without hardener, water-based and discharge ink chemistry will eventually break the stencil down on extended runs. For plastisol runs of any length, no hardener is required. For short water-based or discharge runs (under ~200 impressions), you may not need it. For extended water-based or discharge runs, the hardener is essential. View MS Hardener →
What’s the difference between MS Hardener and Hardener A&B?
Both are Murakami stencil hardeners that add water and solvent resistance. MS Hardener is single-part, applied with a scoop coater, and is RECLAIMABLE when proper procedures are followed — meaning you can still strip the stencil after using it. Hardener A&B is a two-part system that delivers maximum durability but is NOT reclaimable per Murakami’s TDS. Choose MS for screens you want to reclaim and reuse; choose A&B for screens you’re planning to retire or for single-use applications. MS Hardener · Hardener A&B
How long does Murakami Photocure WSR last in storage?
Unsensitized emulsion has a shelf life of at least 1 year at room temperature (per murakami tds). sensitized emulsion: use within 1 week per murakami tds.. Coated unexposed screens last up to one month at 59-77°F (15-25°C), 30-50% relative humidity, in total darkness. Exposed (cured) stencils are stable indefinitely. Sensitized Murakami Photocure WSR should be used within 2-3 weeks at room temperature per Murakami’s TDS — refrigeration extends usable life.
How thick should my stencil be?
For most textile work, one coat each side of Murakami Photocure WSR is sufficient. Per Murakami’s TDS, additional coats may be added to the print side or squeegee side if thicker stencils are required. For very high deposit work (puff plastisol, glitter ink, foil base), consider building up the squeegee side with multiple wet-on-wet coats, or use Chromaline Super PHAT capillary film bonded with Murakami Photocure WSR for 100-700µm stencil thickness.
What’s the right drying temperature and humidity?
Per Murakami’s TDS, target Up to 104°F (40°C) per TDS drying temperature at 30-50% relative humidity relative humidity, with good air circulation. A screen drying cabinet with heated airflow holds these conditions reliably. Drying temperatures over 104°F (40°C) can pre-cure the emulsion and cause exposure problems.
How do I reclaim a screen after using Murakami Photocure WSR?
Per Murakami’s TDS — (1) use Murakami 501, 505, or 507 Screen Cleaner to remove all excess ink from the frame; (2) remove the emulsion with Murakami 601, 605, or a solution of Strip Super-P; (3) rinse thoroughly; (4) use Murakami 701 to remove haze and ghost if required; (5) degrease with Murakami 801, rinse both sides thoroughly, and let dry. View screen cleaning chemicals →
What if my stencil washes out during exposure?
Most common cause: underexposure. Per Murakami’s TDS, exposure depends on mesh color, emulsion type, coating thickness, lamp type, and bulb age. Run a Stouffer wedge test to dial in correct exposure time for your specific shop. Other possible causes: emulsion that’s too thin (add more coats), light source too weak (consider upgrading to metal halide or LED), screen positioned too far from exposure source, or contaminated mesh (re-degrease and recoat). The Emulsion Troubleshooting Guide covers each scenario in detail.
What exposure unit do I need?
Per Murakami’s TDS, exposure data is provided for 3kw metal halide lamp (uv42 intensity: 12 mw/cm²). LED UV exposure units can also work but typically need longer exposure times than metal halide for diazo emulsions. Standard fluorescent exposure units can work but require longer exposure times. The exposure data in the Technical Specs tab is a starting point; a 21-step Stouffer wedge test takes 5 minutes and dials in your specific exposure unit accurately.
Why is the emulsion blue?
The blue color makes the stencil visible during coating (so you can see uneven coverage and fix it), during exposure registration (so you can align film positives accurately), and during reclaim (so you can see when the stencil is fully removed). Pure-clear or near-clear emulsions are harder to work with for these reasons. Murakami offers emulsions in blue, pink, violet, and magenta depending on the formulation.
Can I use this emulsion for water-based printing without a hardener?
Yes for short runs (under ~200 impressions) and for single-job use. Per Murakami’s TDS, Murakami Photocure WSR is suitable for water-based and discharge inks when hardened with Murakami Hardener and/or Hardener A&B for extended-run durability. Skip the hardener and the stencil chemistry will gradually break down as the aqueous ink attacks the emulsion. The decision is run length: short runs don’t need it, long runs benefit dramatically from it.
Is shipping really same-day?
Yes — Murakami Photocure WSR ships from RCS’s San Antonio, TX warehouse. Orders placed before 3:30 PM Central Time on a business day typically ship the same day. Most US destinations receive shipment in 2-5 business days via standard ground. FREE shipping on orders over $200. Need it faster? Call us at (512) 454-0505 for expedited shipping options.
Questions Before Ordering?

Call us — we’ll help you pick the right Murakami emulsion for your inks and workflow. RCS has supplied screen printers since 2008. We use Murakami emulsions ourselves and can talk through specific issues.

(512) 454-0505

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