STS Inks TPU Black DTF Powder – 1kg Bag – Premium Polyurethane Adhesive for Dark Garments
STS
STS TPU Black DTF Powder is a premium polyurethane hot-melt adhesive powder formulated specifically for DTF printing on dark garments, low-quality polyester, and poly-blend shirts. The black pigment eliminates powder visibility at transfer edges on dark fabrics and reduces dye migration — the #1 problem when pressing DTF transfers on cheap polyester shirts. 1kg bag. Low 225°F melting point. 70–80μm particle size. OEKO-TEX certified. Drop ships fresh from STS in Florida.
$70.00
Description
STS TPU Black DTF Powder — The Right Powder for Dark Garments
Standard white DTF powder works perfectly on most garments. But on dark fabrics — especially low-quality polyester and poly-blend shirts — white powder can show through the transfer edges, telegraph visible on the fabric, or cause adhesion issues caused by dye migration from the garment. STS TPU Black DTF Powder solves this. The black pigment in the adhesive eliminates the powder-visibility problem on dark substrates, and the polyurethane formula maintains the same excellent flexibility and wash durability you expect from STS powder. This is not just a cosmetic change — black powder actively reduces dye migration from low-quality polyester on dark shirts, producing cleaner transfers with better long-term color retention.
Why Black Powder vs. White Powder
White powder can be visible at transfer edges on very dark fabrics, especially when the design has transparent or semi-transparent areas. Black powder blends with the garment background — the edge disappears.
Low-quality polyester and poly-blend shirts can leach dye into transfers — especially under heat. Black powder acts as a barrier layer that significantly reduces dye bleed-through compared to white powder on these substrates.
Black powder uses the same TPU polyurethane hot-melt chemistry as white powder. The same low 225°F melting point, the same 70–80μm particle size, the same 15–20 second transfer time. You change nothing in your workflow.
STS black DTF powder carries OEKO-TEX certification — independently tested and verified to meet strict standards for harmful substance limits. Safer for operators and compliant with sustainability programs.
When to Use Black Powder vs. White Powder
| Situation | White Powder | Black Powder |
|---|---|---|
| Light colored garments (white, gray, pastels) | ✓ Best choice | Not recommended |
| 100% cotton dark garments | ✓ Works well | Good option |
| Dark polyester / poly-blend shirts | May show edges | ✓ Best choice |
| Low-quality polyester (dye migration risk) | High migration risk | ✓ Reduces migration |
| Black garments with full-coverage designs | Edge visibility risk | ✓ Best choice |
Pair With
Standard white powder for light garments and most production applications.
Production-grade double-sided matte roll for the XPD-924D and 24″ DTF systems.
Technical Specifications
Technical Specifications
| Specification | Detail |
|---|---|
| Product | STS TPU Black DTF Powder |
| SKU | STS Black DTF Powder 1kg |
| Weight | 1kg (2.2 lbs) per bag |
| Particle Size | 70–80 μm |
| Melting Point | 225°F (107°C) |
| Transfer Temp | 300–325°F (149–163°C) |
| Transfer Time | 15–20 seconds |
| Powder Color | Black |
| Formula | 100% Thermoplastic Polyurethane (TPU) — no plasticizers |
| Certifications | OEKO-TEX Certified |
| Best For | Dark garments, black shirts, low-quality polyester, poly-blend fabrics |
| Compatibility | STS DTF inks; all standard DTF film and transfer workflows |
| Shelf Life | Store in cool, dry place; seal bag after each use |
| Fulfillment | Drop ships from STS in Florida — no same-day guarantee; confirm lead time |
| Returns | No returns on powder products |
Technical Sheets / Safety Data Sheets / Documents
FREQUENTLY ASKED QUESTIONS
Frequently Asked Questions — STS TPU Black DTF Powder
Use black powder when printing on dark or black garments — especially low-quality polyester or poly-blend shirts where dye migration is a concern. White powder can appear visible at transfer edges on very dark fabrics. Black powder blends with the dark background and also acts as a barrier against dye migration from the garment into your transfer.
No — black powder should only be used on dark garments. On white, light gray, or pastel shirts, the black adhesive layer would be visible through the transfer and alter the appearance of light or transparent design areas. Use white TPU powder for all light-colored garments.
No. STS black DTF powder uses the same 225°F low melting point and 300–325°F transfer temperature as white powder. Your cure oven settings, shaker settings, and heat press settings remain unchanged when switching from white to black powder.
Dye migration is the leaching of fabric dye into a transfer under heat — it appears as a discoloration or color shift in the printed design after pressing, especially on polyester. Black powder significantly reduces (but does not completely eliminate) dye migration from dark polyester shirts compared to white powder. For best results, also use lower press temperatures (275–290°F) on high-risk polyester.
This product drop ships directly from STS in Florida. Orders placed before 3:30 PM CT typically ship the same day, but transit time depends on your location. No returns on powder products — please confirm this is the right product before ordering.
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