Soda, 9.
Olive-oil, 76.5.
Water, with a little coloring matter, 14.5.
Fine toilet-soaps are made with oil of almonds, nut-oil, palm-oil,
suet, or butter, combined with soda or potash, according to their
preparation in a solid or pasty state.
16. In the manufacture of white soap, the tallow is more carefully
purified, and no rosin is used. In other particulars, the process
differs but little from that employed in the production of the common
kind. Two tons of tallow should yield three tons of white soap. In
making the same quantity of common brown or yellow soap, twelve
hundred weight less is required, on account of the substitution of
that amount of yellow rosin.
17. The mottled appearance of some soaps is caused by dispersing the
ley through it, towards the close of the operation, or by adding a
quantity of sulphate of iron, indigo, or the oxide of manganese.
Castile soap, now manufactured in the greatest perfection at
Marseilles, in France, receives its beautifully marbled appearance
from the sulphate of iron.