unsaponified

I didn't and ended up with unsaponified PKO lumps throughout my bars ... and since the PKO didn't saponify, the rest of the bar was lye heavy.

FLOAP soap Anne-Marie 2007

Although it is possible, with care, to produce neutral soaps of good appearance and firm touch by this method, cold-process soaps are very liable to contain both free alkali and unsaponified fat, and have now fallen considerably into disrepute.

The Handbook of Soap Manufacture H. A. Appleton

Soap, to be suitable for the purpose, must be free from uncombined caustic alkali, unsaponified fat, silicates, and rosin.

The Handbook of Soap Manufacture H. A. Appleton

Geitel and Lewkowitsch, who have studied this question from the physical and chemical point of view respectively, are of opinion that when an oil or fat is saponified, these three reactions do actually occur side by side, the soap-pan containing at the same time unsaponified triglyceride, diglyceride, monoglyceride, glycerol and soap.

The Handbook of Soap Manufacture H. A. Appleton

It was also further explained why the potash soaps generally sold to the public were unfit for general use, owing to their not being neutral -- that is to say, containing a considerable excess of free or unsaponified alkali, which acts injuriously on the fiber of any textile material, and causes sore hands if used for household or laundry purposes.

Scientific American Supplement, No. 360, November 25, 1882 Various

The method here given partakes of the usual imperfections, that the fatty acids as well as the unsaponified soap are equally estimated, and the mixed hydrate or carbonate of the alkali as well as the combined alkali.

The Art of Perfumery And Methods of Obtaining the Odors of Plants George William Septimus Piesse 1851

Theoretically, he considered a soap-stock made entirely from beef tallow the most suitable for the purpose, but in practice found that the best results were obtained by using a superfatted soap made from a blend of one part of olive oil with eight parts of beef tallow, saponified with a mixture of two parts of soda to one part of potash, sufficient fat being employed to leave an excess of 3 or 4 per cent. unsaponified.

The Handbook of Soap Manufacture H. A. Appleton