Process for changing the color of partial areas of the surface o

Details Process for changing the color of partial areas of the surface o Process for changing the color of partial areas of the surface o

1987-07-07

1988-11-01

Yuen, Henry C.

Heating

Processes of heating or heater operation

Treating an article, container, batch or body as a unit

432 13, 432225, 264 62, 52311, F27D 500

Patent

active

047815795

ABSTRACT:
A process for changing the color of partial surface areas of pigmented, hydraulically bonded construction elements by application of high temperatures thereon, wherein the said partial surface areas are subjected to temperatures of at least 1,000.degree. C., until the desired change in coloration has been achieved.

REFERENCES:
patent: 1463961 (1923-08-01), Ledeboer
patent: 1891479 (1932-12-01), Norton
patent: 2106317 (1938-01-01), Dezendorf
patent: 2902739 (1959-09-01), Foster
patent: 3196193 (1965-07-01), Davies
patent: 3230283 (1966-01-01), Hughes
patent: 4334858 (1982-06-01), Iiyama et al.

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