FIELD: personal use articles.
SUBSTANCE: toothbrush is declared, comprising a piezochromic polymer made with the ability to emit an optical signal indicating the force during cleaning, at that the piezochromic polymer comprises a mechanoform with electrocyclic cycle opening. The embodiment of the toothbrush comprises a polymer based on the dye that responds to convergence, made with the ability to emit an optical signal indicating the force during cleaning.
EFFECT: improvement of the design.
19 cl, 8 dwg
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