Method of marking a synthetic material surface and to an object

Details Method of marking a synthetic material surface and to an object Method of marking a synthetic material surface and to an object

1981-02-25

1983-08-30

Miller, Jr., George H.

Recorders

Thermal recording

346 11, G01D 1510

Patent

active

044019920

ABSTRACT:
A method of marking objects having a surface of a synthetic material and an object having the marked synthetic material for the purpose of identification which method comprises exposing the surface of the synthetic material to a laser beam of light of intensity of at least 1000 kW/cm.sup.2 at the surface of the material and wherein the synthetic material contains a dye and a silicon-containing inorganic compound or a dye comprising silicon, such as, a sulphur containing sodium aluminium silicate which is decomposed to form a color contrast mark on the surface on exposure to said laser beam.

REFERENCES:
patent: 3588439 (1971-06-01), Heller et al.
patent: 3657510 (1972-04-01), Rothrock
patent: 4214249 (1980-07-01), Kasai et al.

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