FIELD: chemistry.
SUBSTANCE: present invention relates to a multicomponent material which includes a substrate and a printed layer on the substrate. The printed layer includes a colour-changing composition for determining state change, for example pH change. The colour-changing composition includes a matrix-forming component, a dye, a surfactant and a pH regulator. The pH regulator includes a low-molecular weight organic acid and a high-molecular weight organic acid.
EFFECT: obtaining a multicomponent material which includes a substrate and a printed layer on the substrate.
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