Sublimation on Cotton: Polyester Percentage and What Works
Can you sublimate on cotton? Learn the polyester percentage rule, how blends and coatings perform, and better methods for cotton and dark shirts.
Why sublimation needs polyester, how results change with polyester percentage, what coatings and sheets can and cannot do, and options for cotton and dark garments.
Sublimation on cotton does not work in the true sense: you cannot get a true, lasting sublimation print on 100% cotton, because sublimation dye bonds to polyester, not cotton; blends work in proportion to their polyester content, with roughly 60 to 65 percent polyester as a common minimum and higher percentages giving brighter results.
Rule: polyester share and garment color decide the result
Sublimation dye bonds to polyester, not cotton. The higher the polyester share and the lighter the garment, the brighter the result.
Part of the DAX Learning Hub: practical, exhibitor neutral guides for apparel decorating. For choosing blanks by fiber content, see Blank Inventory and Sizing.
Also see Sublimation Ghosting and Blowouts: Causes and Fixes.
Find more sublimation guides in the DAX Learning Hub. Related guides: How to Price Custom Apparel Jobs for Profit and Sublimation Printing for Beginners: How It Works and What You Need.
Can You Sublimate on Cotton?
Not in the true sense. In sublimation, heat turns the dye into a gas that bonds with polyester fibers. Cotton has nothing for that dye to bond with, so on 100% cotton you get either no image or a faint surface stain that fades quickly in the wash. More time, heat or pressure does not change the chemistry.
Polyester Percentage for Sublimation
| Polyester content | Typical result |
|---|---|
| 100% polyester | Brightest, most durable color; the reference for sublimation |
| About 75% to 80% and up | Close to full color with slight muting |
| About 60% to 65% | Common minimum; noticeably softer color, often a light vintage look after washing |
| About 50% (50/50) | Faded, heathered vintage look; some fading in the first washes |
| 100% cotton | No real bond; image washes out |
The dye bonds only to the polyester fibers, so the cotton share shows through as lighter, heathered texture and any dye sitting on cotton washes away. Fabric construction varies, so test a blank before a run.
Coatings, Sprays and Sublimation Sheets
Polyester coatings and sprays add a layer the dye can bond to, and some transfer sheets or films let you sublimate onto a printable layer that is then pressed onto cotton. They can work for small runs and crafts, but durability, hand feel and wash life vary widely by product and are generally below sublimation on polyester. Test wash a sample and follow the coating or sheet supplier spec.
Sublimation on Dark Shirts
Sublimation dye is transparent and there is no white sublimation ink, so the garment color shows through and the image disappears on dark fabric. Dark garments need a white printable layer, such as a white sublimation friendly heat transfer vinyl or sheet, under the image, or a different decoration method.
Other Methods for Cotton
If the garment has to be cotton or dark, other methods are built for it: screen printing, direct to garment (DTG), DTF transfers and heat transfer vinyl all work on cotton and dark colors. Each has different setup, feel and run length economics. If a heat applied transfer is not bonding on cotton, see Heat Transfers Not Sticking.
Frequently Asked Questions About Sublimation on Cotton (FAQ)
What polyester percentage do you need for sublimation?
A common minimum is roughly 60 to 65 percent polyester, and many decorators prefer 75 to 80 percent or more for brighter, longer lasting color. 100% polyester gives the brightest result.
Does sublimation work on 50/50 blends?
It works for a faded, heathered vintage look, not for bright color. Only the polyester half takes the dye.
Will sublimation wash out of cotton?
Yes. On 100% cotton the dye cannot bond, so whatever transfers sits on the surface and fades quickly in the wash. On blends, the part on the cotton fibers washes away while the part on polyester stays.
Can you sublimate on black shirts?
Not directly. Sublimation dye is transparent, so black shows through. You need a white printable layer under the image or another method such as DTF or screen printing.
Can you sublimate on cotton with a spray or coating?
You can, but the dye bonds to the polymer layer, not the cotton. Results are usually less vivid and less wash durable than sublimation on polyester, and they vary by product, so wash test a sample and follow the coating supplier spec.
Percentages and results here are typical published guidance. Follow your ink, coating, sheet or blank supplier spec and test before a run.
Comparing blanks and transfer options in person is the fastest way to see these differences. Browse more guides in the DAX Learning Hub, and check cities and dates on the DAX show schedule to compare sublimation blanks and decoration methods with suppliers in person.