Soap-Making Manual: A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.Thomssen, Edgar George
Science
Soap-Making Manual: A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.
Thomssen, Edgar George
Soap
I. lbs.
Cochin cocoanut oil 26
Stearic acid 165
Caustic potash lye, 50deg. B. 69
Glycerine C. P. 76
Water 38
II. lbs.
Cochin cocoanut oil 18
Stearic acid 73
Caustic potash lye, 39deg. B. 54
Glycerine 33
Water 27
III. lbs.
Cochin cocoanut oil 18
Stearic acid 73
Caustic potash lye, 39deg. B. 54
Glycerine 20
Water 40
and lbs.
Stearic acid 60
Glycerine C. P. 85
Water 165
Sodium carbonate 50
Borax 1
To make a shaving cream by Formula I or II, the cocoanut oil and
glycerine are first put into a suitable mixing apparatus or crutcher,
and heated to 120deg. F. A part or all the potash lye is then added and the
cocoanut oil saponified. The rest of the potash lye and the water are
then added, and with the mixer running the stearic acid, previously
melted in a lead-lined or enameled vessel, is then poured in in a stream
and the mass stirred until smooth, care being exercised not to aerate it
too much. The cream is then tested for alkalinity, the best method being
by that described under shaving soap, in which the sample is dissolved
in alcohol. Because of the large quantity of water present,
phenolphthalein is unsatisfactory, as dissociation of the soap may show
a pink indication in spite of the fact the mass is on the acid side. For
a quick method of testing the bite on the tongue is a satisfactory
criterion. If a cooled sample bites the tongue more stearic acid is
added until there is a 3% excess of this. When the proper neutralization
has taken place the cream is perfumed and framed in a special frame, or
it may be allowed to cool in the mixer and perfumed the next day. When
cool the cream is strained, or put through an ointment mill, after which
it is ready to fill into tubes.
The procedure for the first part of Formula III is the same as that just
given. The second part of the formula is made the same as a vanishing
cream for toilet purposes. To make this, first melt the stearic acid as
already directed. Dissolve the sodium carbonate and borax in water and
when dissolved add the glycerine and stir. Then heat this solution to
about 100deg.-120deg. F. and while stirring in a suitable mixing machine
into which this solution has been poured after being heated, or better
still in which it has been heated by dry steam, add the stearic acid.
Continue mixing until smooth and then allow to cool, or run into frames
to cool.
Public-domain text, read in full here on John Shaqi.
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