Patent ID: 8921264
Filing Date: 2014-12-30
Classification: A63H,B32B,B41M,B43K,C09D

Abstract:
1. A thermochromic coloring pad, comprising: a sheet made of synthetic resin supporting a thermochromic material, the thermochromic material having a color activation temperature above 0° C. and a color deactivation temperature of less than human body temperature, whereby the thermochromic material is selectively activatable such that the sheet may be cooled to full color activation whereupon a subtraction image may be drawn on the sheet by contacting the sheet with human fingers, and the sheet may be heated to a point above the color deactivation temperature whereupon a positive image may be drawn on the sheet by contacting the sheet with a writing instrument that is chilled to a temperature less than the color activation temperature.