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Historical formulas

Formulas transcribed from two soap-trade books, Alexander Watt's The Art of Soap-Making (1884) and E. G. Thomssen's Soap-Making Manual (1922). They show how soap was made in factories, mostly boiled and salted out, sometimes with fats nobody sells now, such as house grease and cottonseed foots. We keep them as records, with each book's own figures and a citation. Where every fat is one we carry, the calculator can open the proportions as a modern cold-process soap.

Download the formulas as CSV or JSON, each line as its book printed it, with the page, free to reuse under the ODbL.

2 / 40 How they score on today’s soap quality numbers: 2 of 40 fit every range.
Alexander Watt · 1884

The Art of Soap-Making: A Practical Handbook of the Manufacture of Hard and Soft Soaps, Toilet Soaps, Etc.

E. G. Thomssen · 1922

Soap-Making Manual: A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant

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