Method of laser marking

Details Method of laser marking Method of laser marking

1987-10-22

1989-08-29

Lusignan, Michael

Coating processes

Electrical product produced

Welding electrode

346 11, 346108, 430945, B05D 306, G01D 900

Patent

active

048616206

ABSTRACT:
A pigment layer is provided on a surface of an article on which a marking is to be formed and is irradiated with patterned laser light to change internal molecular structure of pigment to thereby change its color. The marking can be multicolored by a suitable selection of pigment and laser energy density.

REFERENCES:
patent: 3761942 (1973-09-01), Lorenz et al.
patent: 4753863 (1988-06-01), Spanjer
Kokai 54-56576, cited in Patents Abstracts of Japan M-65, Jul. 11, 1979, vol. 3/No. 80.

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