A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...

172 THE METALLURGY OF ANTIMONY.
Beep Yellow No. 11.—This is made like No. 10, but 20 parts of
colcothar or of red oxide are substituted for the carbonate of zinc
and the yellow oxide of iron.
Other yellows are:—
No.
41
42
43
46
47
B. Clear yellow for brown or
green
P.F. Jonquil yellow .
Deep yellow for brown or green .
Deep yellow . . . .
Pale yellow for carnation .
sc No. 2.
Flu
75
79
75
75
84
Lmonate
Potash.
17
14
17
17 4
rbonate
Zinc.
6 °
6. Colouring Matter for the Manufacture of Cloth and Paper.
The oxysulphide of antimony (SbS2O) has been used for this
purpose.
7. Mordants.
The salts of antimony used as mordants are of two kinds—either
basic or acid; the former is used for thickening, the latter for decolorising.
The ordinary mordants are tartar emetic, double oxalSte of
potassium and antimony, and fluoride of antimony.' They are always
used after the application of tannin, when they form antimony
tannates. Oxymuriate of antimony is another form of mordant. It
is sold as a concentrated solution, made by dissolving metallic
antimony in a mixture of hydrochloric acid and nitric acid, diluted
very cautiously to 80° Tw. (specific gravity 14). The tartar emetic,
as used, has the formula:—
Of late, double fluoride of antimony and potassium, or of antimony
and sodium, have been used as substitutes for tartar emetic; also
double oxalate of antimony and potassium, SbKE(C2O4)8.6H20, double
fluoride, SbF3.NaF, and the salt SbF3(NH4)2SO4 are used. The
essential thing for an antimony salt for use as a mordant is that it
shall be soluble in water, not be liable to precipitate antimony oxide,
and yet be readily decomposable.
8
7
4
4
...
4
8