Antistatic stabilizer and final wash additive for photo developing
OwnerJohn A. Chesterinventor
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Abstract
The present invention relates to photographic processing, and specifically discloses the use of ethyl bis (polyethoxy ethanol) alkyl ammonium ethyl sulfate as the effective ingredient in an anti-static additive for photographic processing. The effective ingredient is combined with isopropanol and water in the ratio of 8 oz./2 oz./118 oz. (per gallon) to provide the desired anti-static coating to the photographic negatives.
Claims12
In a wash for the photographic development of transparency films, an anti-static additive comprising:
- water;
- isopropanol;
- and
- ethyl bis (polyethoxy ethanol) alkyl ammonium ethyl sulfate.
In a stabilizer for the photographic development of negative films, an anti-static additive comprising:
- water;
- isopropanol;
- and
- ethyl bis (polyethoxy ethanol) alkyl ammonium ethyl sulfate.
A method of developing color negative film comprising the steps of:
- exposing a negative film to a developer;
- immersing the film in a bleach solution;
- immersing the film in a fixer solution;
- immersing the film in a wash solution;
- and
- immersing the film in a stabilizer comprising an anti-static additive wherein the additive comprises water, isopropanol and ethyl bis (polyethoxy ethanol) alkyl ammonium ethyl sulfate.
A method of developing transparency film comprising the steps of:
- exposing the film to a first developer;
- immersing the film in a first wash;
- immersing the film in a reversal bath for chemically reversing the image;
- exposing the film to a second developer;
- immersing the film in both a pre-bleach solution and a bleach solution;
- immersing the film in a fixer solution;
- immersing the film in a second wash solution;
- and
- immersing the film in a third wash solution comprising an anti-static additive, said additive comprising water, isopropanol and ethyl bis (polyethoxy ethanol) alkyl ammonium ethyl sulfate.
Dependencies are inferred from the claim text.