Processing of photographic silver halide material
AssigneeAgfa-Gevaert
InventorsEdwin Hendrik Hazenbosch, Antoine Roberta Van Rossen, Roland Francois Beels, Marcel Frans Aelterman
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Abstract
Sludge formation is reduced in the fixing and washing station of an automatic processing apparatus for rapid processing exposed photographic elements, by addition to the fixing and/or washing medium of a compound of the formula: R(OCH.sub.2 CH.sub.2).sub.n OH wherein n is at least 12 and R is an aliphatic group of 6 to 24 carbon atoms or an alkylaryl group.
Claims10
A method of rapid processing of black and white photographic silver halide material in a processing machine of the automatic type wherein the imagewise exposed photographic material is sequentially developed in a hardening developer, fixed in a thiosulphate or thiocyanate fixing solution, washed and dried, characterized in that the fixing medium and/or washing medium contains a polyoxyethylene compound of the formula:
- R--(OCH.sub.2 CH.sub.2).sub.n OH
- wherein:
- n is an integer of at least 12, and
- R is an aliphatic group containing from 6 to 24 carbon atoms or an alkyl phenyl group comprising C.sub.6 -C.sub.24 carbon atoms in the alkyl chain or alkyl naphthyl comprising C.sub.4 -C.sub.10 carbon atoms in the alkyl chain.
Dependencies are inferred from the claim text.