Innovator Sreedhar G Patil of Bangalore was supported under TePP for development of this product. More than 60 formulations of High Temperature Indicating Crayons (ranging from 400 deg C to 1200 Deg C) were developed. Usage of Tempindic is simple - mark on the surface of the metal /sheet with the required Tempindic, once the surface reaches the rated temperature of the crayon, the mark would melt and show liquid smear. These crayons are free from lead, sulfur, mercury, cadmium, poly-brominated biphenyls (PPB) or polybrominated diphenyl ethers (PBDE), hexavalent chromium (European RoHS banned substances).Each Tempindic formulation is designed to melt within the accuracy +/-1% of the rated temperature. The Crayons length would be 125 mm having dia of 8.1 mm (arch dia 9.5 mm). A few sample Tempindic Crayons are shown in the picture.
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