METHOD FOR PRODUCING THERMOINDICATORS Russian patent published in 2016 - IPC G01K11/06 

FIELD: measuring equipment.

SUBSTANCE: invention relates to thermometry and can be used to determine heating temperature of cast iron and intermediate chromium steels or other metals and alloys. Method involves arrangement in an inert shell of a substance, signalling the onset of the specified temperature range. Inert shell is obtained by applying on ceramic mold inner surface of at least two layers of 0.1-0.3 mm-thick epoxy resin with self-curing of the previous layer before applying the next layer. After that the mold is filled with the substance, signalling the onset of the specified temperature range, for example, with potassium permanganate, and the upper part of the mold is filled with epoxy resin; after solidification of the top shell layer the mold is destroyed.

EFFECT: increased mechanical strength of the heat-indicator.

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