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This article is from the Darkroom Work FAQ, by Cees de Groot with numerous contributions by others.

3.4. How do I remove water marks?

A recipe by Richard Knoppow <mailto:dickburk@ix.netcom.com>, found in rec.photo.darkoom:

"Try the following. Soak the film for a few minutes in plain water, then treat it for a couple of minutes in stop bath. Swab the surface gently with cotton swabs. If there is anything left treat it with a wash aid like Kodak Hypo Clearing Agent for a minute or two and again try swabbing. This should remove any deposits left by the Photo-Flo. Then wash the film for five minutes and treat in a mixture of distilled water with about one ounce per quart of rubbing alcohol added (Mike Gudzinowicz correct this if wrong) and about half the amount of Photo-Flow recommended by Kodak. Hang it up to dry without further swabbing."

 

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darkroom, photography, water, chemicals, film processing, kodak, enlarger, developer