The oil is run in the crutcher and the temperature of the oil raised to 100 degs. F. by dry steam. Your lye and water are at place temperature. After all the acrylic is in the crutcher, the lye and water are slowly added to reduce any graining of the soap. Towards the end the lye may be extra more rapidly. When all the lye is within, the mass is crutched approximately three hours, or until upon stopping the crutcher a new finger drawn over the top of the soap leaves an impression. If it condition is not realized, the soap must be mixed right up until such is the case. Having attained this point, the mixture is decreased into a frame which should continue being uncovered. The heat produced by your further spontaneous saponification will cause the soap to rise in the middle of the actual frame. After having looking for some days it is prepared to be slabbed and cut directly into cakes.


A potash soap might be made by the cold process just as readily as a soft drinks soap. Soaps of this kind may be made by either of the formulae in a crutcher:

Laundry Soap Machine

Heat the natural skin oils to 190 degs. F., add the lye and crutch until the cleaning soap begins to bunch, when it is prepared to be run into barrels in which the saponification will be completed.


Semi-boiled soaps differ from those made by the chilly process in temperature. In making semi-boiled soaps the fats are often heated to 140° F. Digging in the[Pg 45] lye raises the temperature to 180°—200° F. when saponification takes place.