Processing of video discs

Details Processing of video discs Processing of video discs

1981-05-26

1983-03-08

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Forming sound grooves in records

Die pressing disk type records

264233, B29D 1700

Patent

active

043760872

ABSTRACT:
High density information discs, such as video discs, which have been treated with a fluorinating agent become resistant to and stable under conditions of high temperature and high relative humidity, even after exposure to such conditions for extended periods of time. The treatment with the fluorinating agent is accomplished by use of a bath of an aqueous solution of a "soft" fluorinating reagent, such as fluorosilicic acid or fluoroboric acid.

REFERENCES:
patent: 3882214 (1975-05-01), Nosker
patent: 4228050 (1980-10-01), Martin et al.
patent: 4275100 (1981-06-01), Datt

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