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Response to Rodinal w/sodium ascorbate

from Patrick A. Gainer (pgainer@rtol.net)
If I ever said 4 parts of ascorbic acid to 1 part of sodium bicarbonate (by weight), I'm very sorry. The absolutely properly proper answer is the ratio of molecular weights, acid/bicarbonate, which is 176/84. It is easy in teaspoon measure. 2 tsp acid and 1 tsp baking soda (not powder)to the liter is close enough. If you try using the acid without neutralizing it, you will likely not get an image. No matter what you say about the potassium hydroxide in Rodinal, the amount of it in 1+50 Rodinal is not enough to neutralize the ascorbic acid. Pat Gainer
(posted 8270 days ago)

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