FIELD: process engineering.
SUBSTANCE: invention relates to sealing of laser-made inscriptions on plastics. Proposed method features ability of preventing bleeding or fading of colouring agents and/or absorbers in plastics by sealing inscriptions made by laser thanks to using transparent polymer in making inscription or directly after it. Note that polymer is applied as a separate layer to seal colouring agents.
EFFECT: stable inscription with high contrast on edges and high resistance to ambient effects.
20 cl, 12 dwg, 13 ex
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