Response to Photographers Formulary TF-4 Fixer?

How do you work out that your film never softens in an all alkali process Charlie? Alkaline baths are precisely what does soften gelatine. Gelatine is a protein, and proteins are broken down by alkaline solutions. That's why alkaline chemicals feel slippery to the fingers; they're dissolving the outer layer of skin.
If you don't believe this, put some film into a 10% caustic soda bath for a few minutes and see how hard the emulsion is then.

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