WATT, ALEXANDER. - The Art of Soap-Making. A Practical Handbook of the Manufacture of Hard and Soft Soaps, Toilet Soaps, etc.

London: Crosby Lockwood and Son, 1920. 5th edition, 10th impression. Including an Appendix of Modern Candle-Making. With numerous illustrations. "An important feature in the present volume is the chapter on the Recovery of Glycerine from Waste Leys, in which many processes for recovering this valuable product are given." Chapters include: Saponification Exxplained; The Soap Factory - Its Apparatus and Appliances; Materials Used in Soap-Making;Caustic Leys; Manufacture of Hard Soaps; Making Soap by the Cold Process; Oleic Acid - Soap from Recovered Grease; Cheapened Soaps; Disinfecting Soap; Saponification under Pressure; Various Processes; Manufacture of Soft Soaps; Manufacture of Toilet or Fancy Soaps; Soft Toilet Soaps; Medicated Soaps; Miscellaneous Soaps; Alkalimetry - Methods of Determining the Percentage of Real Alkali in Commercial Soda Ash, Potash, and Caustic Alkali; Methods of Analyzing or Assaying Soaps; Purifying and Bleaching Oils and Fats; Recovery of the Glycerine from Waste or Spent Leys; Useful Notes and Tables. Appendix A. Making Soap in Small Quantities. Appendix B.Modern Candle-Making. Pp.x/310, 43 figure illustrations, a few marginal smudge marks, cracking to inner hinges revealing webbing but holding firm. Brown cloth, title to spine dulled, minor marks to rear board, wear to base of spine. G+.

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