MATERIAL FOR DETECTING ADEQUATE TEMPERATURE ZONE

PURPOSE:To detect adequate temp. zones by colors over a wide range by using the ink prepd. by mixing plural kinds of temp. indicating dyes which are different in discoloration temp. and color development and compounding the mixture with a binder. CONSTITUTION:A material of desired material quality is made into a desired shape and the ink prepd. by mixing plural kinds of the temp. indicating dyes which are different in the discoloration temp. and color development and compounding the mixture with the binder is printed or applied thereon. The adequate temp. zones by colors over a wide range are detected by referring to the predetermined table, etc., of the color versus the temp. zone according to the color development. Whether the object is in the adequate temp. zone or not is thus easily decided.