Removing iridescent stains from vitreous surfaces

Details Removing iridescent stains from vitreous surfaces Removing iridescent stains from vitreous surfaces

1977-03-16

1978-07-25

Bashore, S. Leon

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

65 31, 134 28, 252 793, 252DIG10, B08B 308, C03C 2300

Patent

active

041027060

ABSTRACT:
Iridescent stains are removed from vitreous surfaces by contacting the surfaces with an aqueous solution of hydrochloric acid and sodium fluoride followed by rinsing the solution from the surfaces with water and, optionally, buffing the surfaces with an aqueous mixture of cerium oxide. The method provides benefits not only in cleaning efficiency but also in operational safety to personnel and absence of detrimental effects on surrounding building materials.

REFERENCES:
patent: 37975 (1863-03-01), Pohle et al.
patent: 77834 (1868-05-01), Parrott et al.
patent: 1529239 (1925-03-01), Callard
patent: 2366825 (1945-01-01), Adams
patent: 3130098 (1964-04-01), Levengood
patent: 3171768 (1965-03-01), Levengood
patent: 3310495 (1967-03-01), Masuda et al.
patent: 3753840 (1973-08-01), Plumat
Hackh's Chem. Dictionary, "Hydrochloric Acid, Concentrated-", 4th Ed., 1969, p. 331.

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