Techniques and applications
Why does a white logo change colour on polyester?
A white logo turning pink or dull: what is dye migration, and how does it differ from insufficient opacity? Prepare your garment choice and a useful trial.
Dye migration on polyester: colour can move into the print
A white logo on polyester can change colour when dye moves from the garment into the decoration. This is called dye migration or dye bleed. Heat can play a part, and the change is not always immediately visible. Not every dull print has this cause: insufficient opacity can also allow the garment colour to show through. Have both the garment and print assessed before choosing a different specification.
Why can white on red polyester turn pink?
Dye migration means colourant from the fabric moves into the decoration. A light logo may consequently take on colour from the garment beneath it. A white print on red polyester may, for example, develop a pink tint. Other garment colours can produce different discolouration. This is a possible explanation, not a diagnosis from a photograph alone.
A logo that initially looks correct can still change after cooling or with time. Checking immediately after application therefore does not establish colour stability. This differs from lettering spreading: a logo can keep sharp edges while its colour changes.
Technical background: ink manufacturer Antex on white prints and dye migration. The source mainly discusses screen printing; the distinction between migrating dye and optical opacity also helps frame a garment enquiry. Accessed 23 October 2026.
Dye bleed differs from insufficient opacity
With insufficient opacity, you can see the fabric colour through the decoration. With dye migration, colourant actually moves into the decoration. Either can make a light print look less bright. Adding more ordinary white is therefore not automatically a solution.
| What do you see? | What needs investigation? | What information helps? |
|---|---|---|
| The garment colour shows through from the start | Print opacity and construction. | A photograph of the initial result and the actual garment. |
| An initially white logo changes colour later | Possible dye migration and previous heat exposure, among other factors. | When the change began and how the garment has been used and cared for. |
| The print lifts or the surface becomes shiny | Adhesion, fabric and surface changes too; not only dye migration. | Close-ups and a wider photograph of the entire decorated area. |
This comparison helps describe your observations. Appearance alone cannot establish the cause.
Why model, garment colour and finish matter
“It is polyester” does not provide enough information to select a print specification. Supply brand, item number, composition, colour and any existing patterns or prints. Sublimation-printed polyester can need a different assessment from another polyester garment. Blends and finishes also need individual consideration.
For a repeat order, the previous order number helps, but recheck that the item and colour are unchanged. An approved white logo on one model does not establish that the same specification suits another sports shirt or softshell. With sportswear printing, stretch, positioning and intended use are considered too.
Which choices can reduce the risk?
The garment and printing material need to work together. STAHLS’ describes suitable dye-blocking materials and avoiding unnecessary heat exposure, among other measures. It also stresses following each product’s application instructions. Simply reducing the temperature without considering adhesion and product requirements is therefore not a universal recipe.
A white layer intended for opacity does not necessarily block dye. Specific transfer materials incorporate a barrier against migrating colourants. Suitability, stretch and a trial still matter with these products. The assessment concerns the complete specification, rather than the label DTF, transfer or block-out alone.
Sources: STAHLS’ on fabrics, heat and material selection and product information for a migration-inhibiting transfer material. The product reference is technical background, not a statement that SDLG uses that particular brand or material for your order.
What should a trial on the actual garment assess?
For an unfamiliar combination, discuss whether a trial is needed and agree what it will assess. Use the intended garment model and correct colour, including the planned light areas of the logo. A trial on a different fabric cannot answer the same question.
- Colour: assess white and light logo areas, not just the outside edge.
- Timing: agree when colour and appearance will be reassessed; an immediate check after pressing is not the entire assessment.
- Use: include relevant stretch, comfort and agreed care.
- Reference: record model, colour, artwork version and selected specification for the production order.
A digital proof shows shape and positioning, but is not a material test. A physical trial can help assess risks without guaranteeing every future condition. Costs, assessment and scheduling are agreed beforehand. See also what to check on a workwear sample.
Has an existing logo already changed colour?
Take an overview photograph and a close-up in normal light. Record the garment item, when you noticed the change and whether the clothing has been washed, dried or ironed. Include the care method used. This helps assess the combination more precisely.
Do not re-press, bleach or apply another layer yourself before the situation has been assessed. Additional heat can make matters worse. Whether correction is possible depends on the existing garment and decoration; a repair outcome cannot be promised in advance.
Prepare your polyester clothing order
Send brand or item number, garment colour, composition, quantities by size and required logo positions. State whether you will supply clothing and whether a previously printed example is available. Include intended use, care and required receipt date. SDLG assesses garment and specification together; you do not need to choose the printing process in advance.
Start with workwear printing. For artwork and a complete team order, read our workwear printing preparation guide.