engleski

Selective oxygen plasma etching of thermochromic printing inks

Selective etching with oxygen plasma is one of very few methods suitable for observation of pigments in dry coatings. The feasibility of this method for coating with microencapsulated organic chromogenic composite is studied here. The exposure time required to etch enough binder away is too long for particles’ polymer shells. Polymer envelopes of pigment capsules are much more stable against selective etching than the fully crosslinked binder itself.

Thermochromic printing inks; selective etching; oxygen plasma; pigment capsules

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