thermochromic pigment for fabric

Textile printing puts unique demands on color-change systems. The ink or paste has to survive washing, stretching, heat-press cycles, and direct skin contact — and the thermochromic response still needs to be crisp and repeatable after all of that. These pigments are microencapsulated leuco-dye systems: a color former, a developer, and a solvent coencapsulated in a polymer shell that protects the active chemistry from the binder matrix. The shell integrity is what separates a pigment that lasts through 50 wash cycles from one that fades after five.