The home mechanic and complete self-instructor in carpentry, painting, horse-shoeing, soap making, candy making, baking, taxidermy, tanning, &c by Schofield R. J

Author:Schofield, R. J. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Industrial arts, Formulas, recipes, etc
Publisher: New York, Excelsior publishing house
Published: 1897-03-25T05:00:00+00:00

It is at that point that the coloring matters and perfumes are added, if any are wanted.

The parts should then be run into frames, previously lined with muslin so carefully that no folds be formed at the edges of the box. Each frame should be entirely filled with the soap, and well closed, with the margin of the muslin, and also fitted with a modern cover. The whole should be left for about one day to rest in a mild temperature,the complete change or saponification completing itself in the frames, where the temperature rises spontaneously to sometimes over 175° F. Under the influence of this action the various constituent principles in the mass, including the glycerine, become further combined, and a soap produced almost resembling that of boiled soaps. At the expiration of twenty-four hours the soap may be taken up from the frames, and cut up in bars to dry. Sometimes, especially when mutton tallow is mostly employed with soda for the lye, one-tenth of potash is added, to diminish the hardness of the soap ; at the same time it increases its solubility and quality, the soap resulting from that addition not being brittle when dry, as it would be when exclusively made of hard tallow and soda lye. The yield of such soap is about 150 lbs. to 100 lbs. of fat.

SOAP-MAKING BY STEAM.

In large manufactories steam is now employed for the manufacture of soap. The use of it injures the vessels used less than fire, and burning the soap is entirely avoided. Both exhaust and live steam are used, and the simplest method for the employment of either is with an open kettle with double walls. Between these double walls of the kettle the steam may be used, while a coil is introduced into the interior of the kettle, through which steam is also passed. Still better, according to G-erman authorities, is the steam and stirring apparatus of Morfit, which is delineated in the figure annexed. It will be easily understood by examining the illustration that B is a hollow or pipe shaft passing through the

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