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Elimination of color rings on film negativesAbrasive grinding of glass surface, using grinding-grit size of 22.5 micron, prevents formation of interference ring during photoprocessing. To polish irregularities for improved light transmission, contact surface is bathed in aqueous solution of sulfuric acid and hydrofluoric acid.
Document ID
19760000498
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Fleetwood, C. M., Jr.
Rice, S. H.
Spencer, R. S.
Date Acquired
August 8, 2013
Publication Date
March 1, 1977
Publication Information
Publication: NASA Tech Briefs
Volume: 1
Issue: 4
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
GSC-12110
Accession Number
76B10498
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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