Matsui White SWR (WS0575) | Water-Based Opaque White Ink for Water-Repellent Fabrics — Nylon Windbreakers, Coated Polyester, DWR-Treated Outerwear — Good Opacity on Darks, Mix with Neo Pigments for Custom Colors, Soft Hand, PVC-Free
Matsui
Matsui White SWR (WS0575) is a water-based opaque white ink engineered specifically for printing on water-repellent fabrics — DWR-treated outerwear, nylon windbreakers, coated polyester athletic wear, and performance fabrics that cause standard water-based inks to bead up and fail. SWR inks incorporate a modified binder chemistry that bonds to the fluoropolymer-treated surfaces other inks cannot adhere to. White SWR provides good opacity on dark fabrics and can be tinted with up to 15% Matsui Neo Pigments for custom colors. ⚠️ Requires Fixer V (not Fixer WF-N) for wash fastness. Mesh 110–135/inch. PVC-free.
Price range: $49.99 through $899.99
Description
Matsui White SWR — The Ink That Sticks Where Others Bead Up
Water-repellent performance fabrics are treated with DWR (Durable Water Repellent) coatings — fluoropolymers that make water bead off the surface. That same chemistry that repels water also repels standard water-based inks. The ink sits on the surface, never bonds to the fiber, and peels or cracks after the first wash. White SWR is formulated with a modified polyurethane binder that bonds to DWR-treated surfaces. It is the water-based solution for decorating Nike Dri-FIT jerseys, Under Armour HeatGear, nylon windbreakers, coated polyester outerwear, and any moisture-wicking athletic fabric that turns standard ink away.
Key Features
⚠️ The DWR Problem — Why Standard Inks Fail on Performance Fabrics
DWR (Durable Water Repellent) treatments coat individual fabric fibers with fluoropolymers — creating a low-energy surface that water molecules cannot bond to. Standard water-based screen printing inks are water-based by nature. When applied to a DWR surface, the ink cannot form the chemical bonds needed for adhesion. The result: ink that sits on the surface, looks fine immediately after curing, but peels, cracks, or completely detaches after the first wash cycle.
SWR inks are formulated with a PU binder that is chemically compatible with DWR-treated surfaces — it penetrates through the coating and forms a durable mechanical and chemical bond with the fiber below. The result is a print that survives wash cycles on the same fabrics that turn standard ink away.
Color Creation — Mixing White SWR with Neo Pigments
How to Create Custom Colors from White SWR
- Start with White SWR as your mixing base.
- Add up to 15% Matsui Neo Pigments by weight for color. Mix thoroughly.
- Add Fixer V at 2–3% for wash fastness. Mix thoroughly.
- Add Retarder MG (1–5%) if needed for open time on longer runs.
- Test print on your specific DWR fabric. Cure fully. Test wash before production.
The resulting ink retains SWR adhesion properties while adding the Neo pigment color. Do not exceed 15% total pigment — higher loads reduce SWR adhesion performance.
Recommended Additives
| Additive | Dosage | Purpose |
|---|---|---|
| Fixer V | 2–3% | ⚠️ REQUIRED for wash fastness on SWR inks. Fixer V is the correct fixer for PU binder inks — do NOT substitute Fixer WF-N. |
| Retarder MG | 1–5% | Extends open time — prevents ink drying in screen during longer runs. |
| Thickener B | 0.25–1% | Increases viscosity for halftone dot retention if needed. |
SWR Series — Both Products
| Product | Type | Fabric Colors | Mesh | Dark Garments? |
|---|---|---|---|---|
| White SWR (WS0575) ← This Product | Opaque white + pigment-tintable base | Light, medium, dark | 110–135/inch | Yes — good on darks |
| Clear SWR (WS0574) | Transparent/clear mixing base for custom colors | Light and medium | 135/inch | No — transparent only |
What Fabrics Can I Print With White SWR?
Technical Specifications
| Specification | Detail |
|---|---|
| Product Name | Matsui White SWR (WS0575) |
| SKU | WS0575 |
| Type | Water-based opaque white ink for DWR-treated water-repellent fabrics |
| Binder | Modified polyurethane (PU) — bonds to DWR-treated surfaces |
| Primary Use | Opaque white printing + tintable base for custom colors on water-repellent fabrics |
| Substrates | DWR-treated nylon, coated polyester, moisture-wicking athletic fabrics, water-repellent outerwear |
| Garment Colors | Light, medium, and dark fabrics |
| Mesh | 110–135/inch (43–52/cm) |
| Squeegee | Medium hardness, sharp blade, 45° angle, medium speed |
| Opacity | High |
| Surface Appearance | Matte |
| Wet Ink Tack | Low |
| After Flash Tack | Low |
| ⚠️ Fixer | Fixer V at 2–3% — REQUIRED for wash fastness. Do NOT use Fixer WF-N. |
| Retarder | Retarder MG at 1–5% for open time |
| Thickener | Thickener B at 0.25–1% if needed |
| Max Neo Pigment Load | Up to 15% by weight for custom color tinting |
| Flash Temperature | Varies by fabric — test on specific substrate |
| Cure Temperature | Varies by fabric — test on specific substrate. Standard target: 320°F (160°C) |
| Bleed Resistance | Yes (use Blocker SWR as underbase for maximum dye blocking) |
| Storage | 65°F to 95°F (18°C to 35°C). Avoid direct sunlight. |
| Cleanup | Water and mild soap/detergent |
| Formulation | PVC-free |
| ⚠️ Contamination | Mix in clean vessels only. Contamination may cause positive PVC tests. |
| Available Sizes | Quart, Gallon, 5 Gallon Pail |
| Technical Documents | SWR Technical Data Sheet → |
Technical Sheets / Safety Data Sheets / Documents
FREQUENTLY ASKED QUESTIONS
What fabrics is White SWR designed for?
Water-repellent (DWR) treated fabrics — nylon windbreakers, coated polyester outerwear, water-resistant jackets, DWR-treated performance garments, and coated nylon bags/accessories. If the fabric is designed to repel water, you need SWR.
Can I use standard water-based ink on nylon windbreakers instead?
No — standard water-based inks (301C, Stretch, EasyPrint, Infinity, Alpha) are designed for cotton, cotton-poly, and untreated polyester. On water-repellent coated surfaces, standard inks will not bond properly — they will bead up, crack, or peel. SWR is specifically formulated to adhere to these slick, coated surfaces.
Can I mix custom colors with White SWR?
Yes — mix up to 15% Neo Pigments into White SWR for opaque custom Pantone®-matched colors on water-repellent fabrics. Use CMS Software for Pantone formulas.
What is the difference between White SWR and Clear SWR?
White SWR is an opaque white — use for dark water-repellent fabrics, white underbases, and opaque custom colors. Clear SWR is a clear/translucent mixing base — use for translucent custom colors on light water-repellent fabrics and tone-on-tone effects.
What mesh should I use?
135 mesh.
Do I need a blocker for polyester dye migration?
On dark polyester with dye migration risk, use Kombat Blocker under the White SWR to prevent dye bleed-through. Always test before production — wait 48 hours after curing to check for dye migration.
How long does shipping take?
⚠️ This product drop ships from Matsui out of Gardena, California and may take 2-3 extra days to ship beyond standard shipping times.
What additives should I use?
Use Quick Additive (6-9%) for an all-in-one solution. Or individual additives: Retarder MG (1-5%), Fixer WF-N (1-5%), Softener MG (1-4%).
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