Laser marking method and aqueous laser marking composition

Details Laser marking method and aqueous laser marking composition Laser marking method and aqueous laser marking composition

1994-12-12

1997-11-25

Fuller, Benjamin R.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

347185, 347232, 347240, 347251, B41J 2385, B41J 2355, G03G 908, G01D 1510

Patent

active

056917570

ABSTRACT:
This invention relates to a laser marking method which comprises heating a base article having on its surface a thin film of a laser marking composition containing a color former and a color developer having a melting point of 200.degree. C. or above, and then applying laser light to the thin film. The method of this invention is capable of no-break marking with vivid color development by application of laser light, without causing discoloration of the ground even under a condition of 120.degree. C. or above.

REFERENCES:
patent: 4506278 (1985-03-01), Sakamoto et al.
patent: 4510512 (1985-04-01), Okamoto et al.
Copy of a Communication for the European Patent Office dated Oct. 25, 1996.

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