1.thermochromic pigment,color change by temperature. 2.color change from color to colorless. 3.high quality and best price. 4.color:grass green. 5.activate temperature:33centigrade. 6.minimum order:0.5kg per color. 7.SGS test. 8.widely used in mugs,fabric,plastic,cosmetic,etc... 9.pigment using temperature need under 110 centigrade.