Process for removal of magnetic coatings from computer memory discs
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United States of America Patent
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Mar 27, 1984
Grant Date -
N/A
app pub date -
Jul 6, 1981
filing date -
Jul 6, 1981
priority date (Note) -
Expired
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Abstract
Removal of magnetic coatings from computer memory discs is achieved by immersing the discs in a bath of a sulphuric-acid and glycerine solution while applying an electrical potential between electrodes in the bath, one of which is the disc itself. After removal of the disc from the sulphuric-acid glycerine solution, it is sequentially immersed in alcohol and then water; any remaining coating is next mechanically removed and then the disc is immersed in high purity water and dried.
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