What is a proper way to clean a 35mm negative film stripe before scanning?
What chemicals can remove fingerprints, dust that does not come off by blowing, or strains of glue? What type of cloth does minimal damage when rubbing off dirt?
Answer
For fingerprints and light dust you can use a microfibre cloth. If you have stubborn dirt, dust (or glue!) then you may scratch the emulsion if you rub with a cloth.
In that case you could try film emulsion cleaners, but I would just soak them in lukewarm water, perhaps with a single drop of dishwashing detergent to prevent streaking, then use a soft squeegee and hang to dry.
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