Heico 12 Oz. NH-5 Hardener Liquid Bottle for Black and White Films

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Overview
Heico Hardener Part B for NH-5 Fixer is for the photographer who wishes to regulate the hardener himself should use NH-5 with this hardener.
A hardener is sometimes used in the fixing of film, in order to "harden the emulsion to the base of the film".
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Home Developing: Tips for Getting Consistent Results with C-41 and B&W Film
Jul 28, 2026
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Can you identify a black-and-white film stock from the look of a print?
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What film color balances exist, and does color balance matter for black-and-white film?
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How can I light a glass bottle on white without orange backglow or label reflections?
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