PROCESS OF PREPARATION OF AN AQUEOUS GEL INK WITH VARIABLE COLOR COMPRISING SILVER NANOPARTICLES

A process for preparing in situ an aqueous gel ink with variable color comprising the following steps: (i) preparing a gel-based matrix of aqueous ink comprising an N-Acyl-aminophenol, wherein the hydroxyl group is preferably in meta or para position on the benzenic group, and (ii) adding a solution...

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