To prevent the dyeing fabric deformation, most synthetic fiber before dyeing should prior to finalize the design (temperature 193 ~ 200 ). But because of the oxygen in air under the light catalysis, with fabric of disperse dyes in polyester fiber and additives occur yellowing,discoloration; Or cause disperse dye in under the action of heat sublimation color shallow, we called sublimation fastness decline collectively referred to as thermal migration fastness decline. This phenomenon is the nearly twenty years textile widely used contains large number of non-ionic surfactant amino silicone oil micro emulsion type softener caused. The solution is to switch to a Special heat sublimation fastness ascending agent (Polyester fixing agent), used to finalize the design can prevent finalize the design before the disperse dye sublimation prison descend.