A Study of Methods for Reducing the Final Wash Time of the Eastman Color Print Process

Three methods of reducing the final wash requirement in the Eastman Color Print process are reviewed: (1) higher final wash temperatures; (2) hypo clearing baths; and (3) oxidation of thiosulfate to sulfate. A sulfite clearing bath at pH 5.8 followed by a short final wash is a practical and effective technique of hypo removal. Normal dye stability can be expected as long as proper film emulsion pH (range 5.0 to 6.0) and residual hypo (less than 4/μg/cm²) levels are maintained.

Print ISSN

0361-4573

Published

1969-04

Content type

Original Research

DOI

10.5594/J17892