All formulas presented here are to be mixed at your own risk.
Many photographic chemicals are quite poisonous.
Please observe all precautions suggested by chemical manufactures. All brand names and trademarks are the property of their respective owners. This book has a wealth of formulas, tips and information on chemicals. At the back of the book are extensive and accurate conversion tables for both weights, measures and substitutions. All of the formulas are given in both metric and english measure.