Process for dyeing zinc and zinc alloys

Details Process for dyeing zinc and zinc alloys Process for dyeing zinc and zinc alloys

1980-11-05

1982-02-09

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 62, C23F 726, C23F 504

Patent

active

043148590

ABSTRACT:
A mulit-colored decorative zinc or zinc alloy having locally organic dyestuff-dyed portions in multi-color is prepared by (1) dyeing with a dyestuff zinc or zinc alloy having a dyeable chromate film bonded thereonto, (2) polishing locally the dyed surface of zinc or zinc alloy, (3) making the chromate film on the exposed surface, (4) dyeing with same dyestuff in a different color density the chromate film on the exposed surface, and then the steps (2), (3) and (4) may successively be repeated.

REFERENCES:
patent: 2393640 (1946-01-01), King
patent: 2477310 (1949-07-01), McLean
patent: 2594820 (1952-04-01), Stern
patent: 2604418 (1952-07-01), Stern
patent: 2691627 (1954-10-01), Johnson
patent: 3147153 (1964-09-01), Harris et al.
patent: 4238250 (1980-12-01), Kasuhara et al.

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