Photographers' Formulary 1lbs Potassium Bicarbonate

Since potassium carbonate is more soluble than sodium carbonate, it is used in concentrated solutions where an alkali is needed. Potassium carbonate can be substituted for sodium carbonate an alkali accelerator in developers. As is solubility is much greater, developers with greater concentration can be formulated. Thirteen parts by weight are equal to 10 parts by weight with sodium carbonate. Substituting potassium carbonate for sodium carbonate Will help obtain warmer tones in paper development.Note:To substitute potassium carbonate anhydrous, multiply the amount of sodium carbonate monohydrate by 0.90.