Method of indicating time or temperature-time accumulated value

Chemistry: analytical and immunological testing – Process or composition for determination of physical state... – By thermoparticulating composition

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436 1, 436 2, 436164, 422 56, 422 57, 422 61, 422119, 116206, 374106, G01N 3100, G01N 2100, G01K 300

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active

057563560

ABSTRACT:
A method of indicating a time or a temperature-time accumulated value as a color change (degree of color development), which comprises providing an oxidation-polymerizable dyestuff and the oxidizing agent in a non-contact state and bringing the oxidation-polymerizable dyestuff and the oxidizing agent into contact with each other to polymerize the oxidation-polymerizable dyestuff with the passage of time, and an indicator material therefor.

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