A mild acid is often added to amidol formulae to prevent oxidation, which can cause staining of the print. |
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If you find it necessary to mix amidol in hot water, do so under a fume hood or outdoors. |
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Agfa Brovira is said to be the only pure bromide paper still in production, and amidol formulas do indeed give cold blue-black hues with this paper. |
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