New-York tribune., 1921-11-13

ingredients mentioned in the govern
mens standards, particularly mois-
ture, hllers and washing soda.
The suds test was made by adding
standard soap solution from =
graduated measuring tube to equal
amount of water (170 degrees FL.
the test bottles, shown In the photo
graph, shaking and adding more
soap until a permanent suds was OH
tanned or standing for three min
utes.
The bottle wash test was made
oy adding equal amounts Of soap
solution to the hot water (150 de-
gree F.) N the proportion used in.
sne washing machine. Then strip
OF cloth impregnated with burnt
lumber was hung in each bottle and
the eleven bottles we're shaken as
enc group The bottles bore kew
numbers and We're arranged in order
OF cleanliness of the cloth and tube
and depth of color of the water.
Five people gave Judgment, with the
results indicated in the photograph.
which confirmed closely the formal
washing tests made.
The washing tests were all made
IN an oscillating type machine of
high efficiency, using the regulation
amount OF water (170 degrees F.);
The soap solution used was prepared
first using equal weights of soap
and then with amounts were regu-
lated by relative price {o.5 cents
worth afforded a fair test).
Prices, of course, will vary from
time to time and according to the
type Of store handling the soaps.
The prices used have been checked
carefully at different stores and at
different times and may vary one
or two cents, but fair average has
been used. The variations in later
prices, if considered, would only en-
phasize the results as recorded.
The two five-inch test cloths.
equally ilnpregnated with umber.
were put into the machine with a
filler of sheeting, etc, and the ma
chime was run, as in any standard
! test, for fifteen minutes. These
squares were key numbered and ar
ranged in order of their cleanliness
by seven different individuals who
had no way of identifying the sew
eral soaps with the SAMPLES. The
agreement of opinion expressed was
remarkable, being unanimous in re-
gard to the first and last samples.
and always large majority agreed
on each relative rating recorded.
(See illustration.)
A number of other tests were
made to confirm the data reported.
and some Of the work which did not
yield clear-cut results and is very
technical has been omitted from
this discussion. For instance, the
! emulsion and surface tension tests
made closely confirmed the suds
test, thus giving them additional
weight. On the other hand, the ex-
periments made to test the effect
on coiors and deterioration of the
fiber were negative in the latter
case and interesting, but not clear
cut, in regard to the colors.
Martin Il. Fisher has, in his re-
Gently published book "Soaps and
Proteins, done much to establish
better understanding Of soap and
its peculiarities. While Mr.. Fischer's
work is directed primarily toward
the consideration of soaps from
biological standpoint, he has given
a good deal of space to the appli-
cation of, his conclusions in the field
OF washing soaps. The book assisted
materially in the Interpretation Of
our test results. published by John
Wiley & Sons. Inc, New York;
Discussion of Tabulated Results
In making practical application of
the results, recorded in the table, one
must consider each soaps record an
whole and not place undue enpha-
SIS on any one test; and also note that
different soaps are especially adapt
ed TO different purposes. 1t is per-
haps unfair to compare bar soaps
and Hake soaps at all, since the for
rer have more water, of necessity,