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Lexicon22 September 20261 min

Sublimation: definition and the light polyester limit

Sublimation turns ink into gas to dye the fiber itself, with no texture and no cracking, but only on light-colored polyester.

Sublimation: definition and the light polyester limit

Sublimation

Sublimation is a textile printing technique where the ink turns to gas under the combined action of heat and pressure, then works its way into the fabric's fibers. Unlike other techniques, it lays no layer on top of the textile: the design melts into the fiber instead of sitting on it.

Sublimation in practice

In the workshop, the design is printed first on special paper using sublimation ink. The heat press then turns that ink to gas, it travels through the fabric's fibers and sets solid again as it cools. The result: no added thickness, nothing to feel by touch, and it never cracks, even after dozens of washes.

The limit is strict, and worth stating upfront: sublimation only works on polyester, and only on a white or very light background. The technique dyes the fiber, it does not lay white ink over a color: on a colored or dark fabric, or on cotton, the process simply does not take. That is why it shows up mostly on technical sports jerseys (polyester, light-colored cuts) and polyester-coated items like mugs or phone cases, rarely on a plain cotton t-shirt.

What to remember

  • Sublimation ink turns to gas under heat and dyes the fiber instead of sitting on top of it: no texture, no risk of cracking.
  • Its strict limit: only on light or white polyester, the technique cannot lay white over a dark color.
  • It shows up mostly on technical sports jerseys and polyester-coated items, like mugs or phone cases.

FAQ

Frequently asked questions

Why doesn't sublimation work on cotton?

Sublimation needs a synthetic fiber (polyester) for the ink gas to bond deep into it. Cotton does not have that structure: the ink stays on the surface instead of penetrating, and the design does not hold.

Sublimation or [screen printing](/en/guides/serigraphie)?

Sublimation wins on light polyester, for a finish with no texture and no color limits. Screen printing works on any fabric, including cotton and dark colors, but costs more per color. The choice starts with the fabric and the color of the item.

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