Method of marking a surface of an object by means of a laser lig

Bleaching and dyeing; fluid treatment and chemical modification – Dyeing process utilizing electric – magnetic – or wave energy;...

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8506, 8552, 8571, 8574, 8593, 8605, 8616, 8649, 8670, 811552, 811553, 8920, D06P 102, D06P 300, D06P 520

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active

055541968

ABSTRACT:
Method of marking a surface of an object by means of a laser light beam.
A description is given of a method of decorating or marking, for example, synthetic resin objects by means of an UV-laser or IR-laser by coating the object with a layer of a dye precursor and a coupler in a binder. For the precursor use is made of a heterocyclic mono- or bis-arylsulphonylhydrazone and for the coupler use is made of, for example, an indole, aniline, pyrazoline or malonitrile, so that after irradiation with UV-laser light or IR-laser light an azo-dye (XXX) is formed.

REFERENCES:
patent: 3146348 (1964-08-01), Workman
patent: 3149990 (1964-09-01), Coles et al.
patent: 4207111 (1980-06-01), Fujiwhara et al.
patent: 4430420 (1984-02-01), Adin
patent: 4433037 (1984-02-01), DoMinh
patent: 4742042 (1988-05-01), Hiraishi et al.
Justus Liebigs Annalen Der Chemie, "Quartare Heterocylische Azosulfone", Hunig et al., 1966, pp. 116-139. No Month Available.

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