Dye sublimation is a specialized chemical printing process that transitions specialized inks directly from a solid state to a gas under high heat and pressure. The gaseous dye permanently penetrates and binds with synthetic polymer fibers, altering the color at a molecular level. Because the ink fuses into the fabric rather than drying on top, the finished garment maintains its absolute original softness, weight, and breathability.
This engineering makes sublimation the industry standard for performance activewear, cycling jerseys, and any design requiring complex, all-over print (AOP) patterns.
Use sublimation exclusively on light-colored synthetic fabrics (polyester/spandex blends) where breathability and stretch cannot be compromised. Do not spec sublimation for cotton, as the fibers cannot bond with sublimation inks.
Sublimation vs. All-Over Screen Printing
Crucial production limitations: Cotton and Creases
The most critical chemical constraint of sublimation is its absolute dependence on polyester. If applied to a cotton garment, the ink fails to adhere to natural fibers and washes out completely on the very first cycle. For vibrant results, a minimum of 80% polyester content is required.
Additionally, designers must choose between two production routing structures: Roll-to-Roll (Cut & Sew) or Blank Garment Printing. Printing over pre-assembled white blank t-shirts introduces structural flaws: the transfer paper cannot reach inside armpits, seams, or collar folds, leaving unintended white streaks or unprinted creases that damage retail value.
Production specs for your tech pack
| Spec | Value | Notes |
|---|---|---|
| Print method | Dye Sublimation (Thermal Transfer) | Specify industrial heat-press fusion execution |
| Fabric specification | Minimum 80% Polyester / Synthetic | 100% Polyester yields maximum color saturation |
| Production method | Cut & Sew (Roll-to-Roll) | Highly recommended over pre-made blanks to eliminate creases |
| Base fabric color | White or Ultra-Light base only | Sublimation inks cannot lighten naturally dark fibers |
| File format | Vector (AI, EPS) or high-res layout | Must include full bleed allowances for garment panels |
| Stitch mapping | Spec flatlock or overlock post-printing | White thread exposure can happen if panels stretch excessively |
In FlatLabs PRO, specifying sublimation triggers an automated workflow optimization that switches your patterns to a flatlock assembly system to ensure zero white seam gaps post-assembly.