Heat activated indica on textiles

Claim 1

Textile articles with hidden indica activated by heat comprising: (a) a textile article of woven fabric having a major surface defining the front of the textile article as viewed by the user made from natural or man made fibers, (b) a design on said major surface of the article impregnating the textile with a substance having a permanent coloring agent, and (c) indica infused into said textile article with thermochromatic ink integral with said design hidden at normal prevailing ambient temperatures and visually appearing when subjected to external heat said thermochromatic ink comprises in combination a blend of water, gum turpentine, neutralizer, pigment-resin color, and a substance consisting of 30% organic pigment, 30 % polyacrylic ester emulsion, 30% water, 7% mineral spirits and 3% ethylene glycol, said design is characterized by an ornamental mark providing a contrast in color of said article located in such a manner as to allow said indica to convey a message when visually manifested with said indica appearing between 90 degrees F. (33 degrees C.) and 108 degrees F. (42degrees C.) and visible at temperatures thereabove.