Bleach-accelerating compositions comprising sorbitan ester compo

Details Bleach-accelerating compositions comprising sorbitan ester compo Bleach-accelerating compositions comprising sorbitan ester compo

1988-03-01

1989-06-13

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430393, 430407, 430430, 430461, 430493, G03C 550, G03C 544

Patent

active

048392626

ABSTRACT:
Improved bleach-accelerating compositions that are especially useful in the reversal color processing of photographic elements are comprised of a bleach-accelerating agent and an ethyleneoxy-substituted fatty acid ester of sorbitan. The bleach-accelerating composition is utilized subsequent to the color developing step and prior to the bleaching step and serves to enhance the effectiveness of the bleaching step. Incorporation of the ethyleneoxy-substituted fatty acid ester of sorbitan in the bleach-accelerating composition serves to avoid or at least minimize problems of scum formation which commonly occur in such compositions.

REFERENCES:
patent: 3893858 (1975-12-01), Wabnitz
patent: 4059446 (1977-07-01), Hazenbosch et al.
patent: 4322493 (1982-03-01), Shibaoka et al.
patent: 4590150 (1986-05-01), Fujita
patent: 4604525 (1986-08-01), Kitada et al.
Foster Dee Snell, "Surface-Achis Agents", pp. 107-130, 1943.
McCutcheon's, "Detergents and Emulsifiers", p. 245, 1970.
McCutcheon's, "Functional Materials", p. 162, 1980.
M. R. Murray et al., "Conditioning Baths for Use in Photographic Processing", Research Disclosure; vol. 191, Item 19104, Mar., 1980.

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