Mammography film also has an anti-halation layer, which can be helpful, too. I vote for pyrocat-hd: it is helpful for non-silver UV contact printing. Light at the start or the end of the day or "warm" interior lights require more exposure, often much more b/c there's less of the UV/Blue (and maybe green it depends on the film) in the light. I've been without a darkroom for a long time. I need to get back to it.
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