WOOL THROWER'S SOAP.
Soaps for wool throwing are sometimes made from olive oil foots but these are often objected to because of the sulphur-like odor conveyed to the cloth due to the method by which this oil is extracted with carbon disulphide. A potash soap hardened somewhat with soda is also used. As a formula for a suitable soap of this type this may be given.
| Olive Oil Foots | 12 parts |
| Corn Oil | 46 " |
| House Grease | 20 " |
| Soda Lye, 36° B. | 3 " |
| Potassium Carbonate (dry) | 5-3/4 " |
| Potassium Hydrate (solid) | 23 " |
This soap is made as a "run" soap by the general directions already given for a soap thus made. The kettle is boiled with open and closed steam, adding water very slowly and aiming to obtain a 220-225 per cent. yield or fatty acid content of the finished soap of 46 per cent. When the soap is finished a sample cooled on a plate of glass should be neither slippery or short, but should string slightly. The finished soap is run directly into barrels.
A soap for wool throwing by the semi-boiled process may be made from olive oil foots in a crutcher thus:
| Olive Oil Foots | 600 lbs. |
| Potash Lye, 20° B. | 660 " |
The oil is heated to 180° F., the lye added and the mass stirred until it bunches, when it is dropped into barrels.