| abstract |
A B S T R A C T The invention relates to a thermochromic paint which is used to coat plastics material, the paint having an additive which reduces the ten-dency of the paint to degrade the plastics material under heat treatment. The thermochromic paint consists of a binder, a thermochromic pigment dis-persed therein, and as additive compound a sulfide, nitride or an optionally hydrated sulfate, or oxide, or a salt, free acid or organic compound deriv-able therefrom, of zinc or of an element of Group III B, IVB or VB of the periodic table. |