Patent ID: 7951210

Claim:
A process for the generation of colors on a support, comprising reactivating, under the effect of a light stimulus, of an inactivated hemoglobin as one or more inactivated oxidation catalysts on the support, said inactivated hemoglobin containing at least one photolabile nitrophenyl group, said process comprising: a) photoreversibly inhibiting said one or more oxidation catalysts, b) immobilizing the one or more oxidation catalyst of (a) on the support to be colored by dipping the support to be colored in a solution comprising the one or more oxidation catalyst to produce a support comprising immobilized inactivated catalyst, c) reactivating with light stimulation the immobilized inactivated catalyst of the support comprising immobilized inactivated catalysts, d) impregnating the support resulting from (c) with a solution comprising one or more chromogenic substrates, one or more aromatic compounds and one or more oxidizing agents, thus making it possible to develop the colors on the support at the spot activated by the light stimulation.