Substrat zum Verpacken von oder Anbringen an verderblichen Produkten und Verfahren zu deren Qualitätsbestimmung

摘要

The invention relates to a substrate for packaging time- and temperature-sensitive products or for application thereon. According to the invention a planar time-temperature integrator consisting of a matrix and at least one reversible indicator embedded therein is arranged in the area of the substrate. The indicator has photochromic properties based on transfer reactions.