Migration occurs when disperse dye in polyester moves towards the surface and transfers to other materials or to a white print, especially under heat (pressing, storage, transport). A typical effect is a pink or yellowish stain on white, on red or black sportswear, when applying transfers or in warm packing.
It is reduced by disperse dyes with good fixation, reduction clearing and a suitable heat-setting temperature. If you print white on coloured polyester, ask for a thermal migration test, not just a rubbing test. The ISO 105 P01 type test checks dry heat stability. A well cleaned fabric is safer.
migrationpolyesterdisperse dyes
