Murakami Emulsion Hardener Part B – Permanent Two-Part Stencil Hardener (Step 2)
Murakami
Murakami Emulsion Hardener Part B is the second and final step in Murakami’s two-part permanent emulsion hardening system. Used immediately after Part A has been applied and allowed to dwell, Part B penetrates and locks the emulsion structure to deliver permanent, extreme-durability stencil hardening for water-based and discharge screen printing. Part B must be used with Part A — it is not a standalone hardener. Sold separately for shops restocking Part B without needing a new complete kit.
$29.99
Description
Step 2: The Final Lock in Murakami’s Permanent Hardening System.
Part A is reclaimable on its own. Part B is what permanently locks the emulsion — applied after Part A, it penetrates and chemically seals the stencil structure for maximum durability. Once Part B is applied, reclaiming becomes significantly harder. This product is sold separately for shops that need to restock Part B.
Key Features
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Part B Is What Permanently Locks the Emulsion
Part A alone is reclaimable. Part B is the step that permanently locks the emulsion structure — creating maximum resistance to water, discharge inks, abrasion, and humidity. Once Part B is applied, reclaiming is significantly harder.
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Available for Restock
Sold separately so shops that have already purchased the A&B Kit can restock just the component they need — without purchasing a full new kit when only Part B has run low.
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For Water-Based & Discharge Environments
Part of a system specifically engineered to withstand the penetrating moisture of water-based and discharge inks that can break down standard unhardened emulsions during long runs.
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Permanent — Reclaiming More Difficult
Part B is a permanent hardener component. The final hardened stencil will be significantly harder to reclaim. Use proper reclaim chemistry and reclaim promptly after printing.
How to Use Part B in the Two-Part System
Screen must be exposed, developed, blocked out, and fully dry before hardener application.
Using a clean lint-free cloth, soft brush, or sponge, apply a thin, even layer of hardener to both sides of the screen. Allow to air dry or cure in a 100°F hot box per Part A dwell time instructions.
After Part A dwell time has elapsed, apply Part B evenly to both sides of the screen using a clean lint-free cloth, soft brush, or sponge, apply a thin, even layer of hardener to both sides of the screen. Ensure even, complete coverage.
Allow Part B to dry per manufacturer’s dwell time guidelines.
Hardened stencil is ready for press. Reclaim promptly after printing using appropriate reclaim chemistry.
⚠️ Part B Cannot Be Used Alone
Part A alone is reclaimable. Part B is what permanently locks the emulsion — making reclaiming significantly harder. Part B must be used after Part A; it cannot be used alone. Using Part B without first applying Part A will not produce the intended hardening effect. If you need the complete starter system, the Murakami A&B Quart Kit includes both components.
Also From Murakami
Murakami A&B Permanent Hardener Kit
The complete two-part system — includes both Part A and Part B quarts. The right choice if you’re starting the permanent hardening system or need to replace both parts.
Murakami MS Reclaimable Hardener
Need tough stencils but still plan to reclaim regularly? MS Hardener is a one-part reclaimable alternative to the permanent A&B system.
Murakami Hardener Comparison
Murakami makes three hardener products that are often confused. Here’s how they differ and when to use each one.
| Product | Type | How to Use | Reclaiming | Best For |
|---|---|---|---|---|
| MS Hardener | Reclaimable One-part | Apply alone with scoop coater to both sides. Cure in sunlight or 100°F hot box. | More difficult than untreated — but still reclaimable with proper chemistry | Tougher stencils for long runs while still reclaiming screens regularly |
| Part A (included in A&B Kit) | Reclaimable Two-part, Step 1 | Apply first with scoop coater to both sides. Air dry or hot box. Part B follows. | Reclaimable on its own — becomes permanent once Part B is applied | Step 1 of the permanent hardening process — must be followed by Part B to achieve maximum durability |
| Part B (sold separately) | Permanent Lock Two-part, Step 2 | Apply after Part A has dried. Scoop coater to both sides. This step permanently locks the emulsion. | Permanently locked — significantly harder to reclaim | When maximum durability is needed and reclaiming difficulty is acceptable. Sold separately for restock. |
Ready to Order?
Order before 3:30 PM CT for same-day shipping. Free shipping on orders $200+.
The Complete Murakami Product Line at River City Supply
Murakami Screen USA produces professional emulsion hardeners, screen reclaim chemistry, and blockout products trusted by high-volume screen printers.
| Process Step | Product | What It Does | Order |
|---|---|---|---|
| Anytime — Blockout | Murakami 901 Red Blockout | Fast-drying red liquid blockout for sealing pinholes and open screen areas. Plastisol ink compatible. | Shop |
| Anytime — Blockout | Murakami 905 Blue Blockout | Fast-drying blue liquid blockout. High-contrast visual indicator for coated areas. | Shop |
| Step 1.5 — Emulsion Hardener | Murakami A&B Two-Component Hardener | Two-component hardener for maximum stencil durability. Dramatically increases solvent and wash resistance. | Shop |
| Step 1.5 — Emulsion Hardener | Murakami MS Single-Component Hardener | Single-component emulsion hardener. Strong durability improvement with easier mixing than A&B. | Shop |
| Step 1.5 — Hardener Component | Murakami Part B Hardener This Product | Part B component of the Murakami hardener system for permanent emulsion hardening. | Shop |
| Step 4 — Dip Tank | Murakami 605 Dip Tank Solution | Professional dip tank solution for controlled soak screen reclaiming. | Shop |
| Step 5 — Ghost Image Removal | Murakami 701 Haze Remover | Professional haze and ghost image remover. Restores mesh clarity after reclaim for clean recoating. | Shop |
Technical Specifications
| Specification | Detail |
|---|---|
| Product Type | Permanent Emulsion Hardener — Part B Only (Step 2 of 2) |
| Hardener Type | Permanent |
| Requires | Must be used with Murakami Part A (Step 1) |
| Application Method | Scoop coater or coating trough — both sides |
| Application Timing | After Part A dwell time has elapsed |
| Emulsion Compatibility | Most photo, dual-cure, diazo emulsions |
| Inks | Water-based and discharge |
| Reclaiming | Possible but significantly more difficult |
| Purpose | Restock for shops whose Part B has run low |
| SKU | MUR B Hardener |
| Brand | Murakami |
Questions? (512) 454-0505 or [email protected]
Technical Sheets / Safety Data Sheets / Documents
FREQUENTLY ASKED QUESTIONS
Can I use Part B without Part A?
No. Murakami Part B must be used in combination with Part A as Step 2 of the two-part hardening process. Part B alone will not provide the full hardening effect. If you need a complete starter kit, the Murakami A&B Quart Kit includes both parts.
Why would I order Part B separately instead of the A&B Kit?
Part B is available as a standalone product for shops that have already purchased the A&B kit and are running low on Part B specifically. In some workflows, Part B may be used up faster or in different quantities than Part A.
Is this a permanent hardener?
Yes. Part B is the second step in Murakami’s permanent hardening system. When used with Part A, it creates a permanent chemical reinforcement that significantly increases reclaim difficulty compared to untreated or reclaimably-hardened stencils.
What inks and emulsions is it designed for?
The A&B system is designed for water-based and discharge screen printing and is compatible with most photo, dual-cure, and diazo emulsions.
Does Part B require a curing step?
Follow Murakami’s application order and dwell times precisely. Each part should be applied to both sides of the screen using a clean scoop coater, then allowed to air dry or cure in a controlled environment per the manufacturer’s guidelines.
Ready to order? Same-day shipping before 3:30 PM CT.
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