Enamels and enamelling; an introduction to the preparation and ...

Potassium antimonite pigment,
52.
compounds for enamels,
23-5.
Preparation of technical enamels,
100-35.
Purple enamel, 181.
of cassius, 59.
pigments, 59-61.
Q.
Quartz, purifying, 18.
sand. See Silica.
See Silica.
Quenching enamel masses, 116.
quartz, 20.
Red enamel, 181.
lead, 32.
pigments, 48, 57-61.
Re-enamelling old ware, 148.
Refractory enamels, 119.
ground enamels, 122.
Repairing defects, 154, 155.
Rock crystal.
See Silica.
Roman glass, composition of, 9.
Rose purple pigment, 60, 61.
Rossler's gas furnace, 76, 77.
S.
Saltpetre as a decolorant, 73, 77.
Scouring ironware for enamelling,
159.
Sedimentation, washing quartz
by, 19.
Sheet metal ware, enamelling, 157,
168, 170.
Silica, 15-22.
acid character of, 16.
allotropic forms of, 15.
impurities in, 17, 18.
preparing for use, 19-22.
properties of, 15.
purifying, 18.
soluble, 16.
solvents of, 16.
sources of, 16, 17.
INDEX. 187
Silica, testing, 82.
purity of, 18.
varieties of, 16.
Silicates, pigmentary, 7.
Silver, colour reactions of, 85.
oxide pigment, 54.
Smalt, 68, 69.
as a decolorant, 120, 121.
Smelting, electric, 110-1.
enamel masses, 103-17, 129.
furnaces, 107-11.
Soda, calcined, 25.
" enamel," 26.
Sodium carbonate, 25. See also
Soda.
chloride, 25.
compounds for enamels,
25-7.
gold chloride pigment, 58.
nitrate as a decolorant,
73.
sulphate. See Glauber salt.
Specialties in enamelling, 167-71.
Sugar moulds, enamel for, 168.
Sulphate of potash, 24.
T.
Testing effect of decolorants, 75-7.
enamelled ware for lead
compounds, 128, 156.
fired enamels, 155-6.
pigments, 84.
raw materials and enamel
mass, 78-86.
water, 88.
white lead, 33.
Tin ash. See Tin oxide.
gold chloride pigment, 59.
oxide, 35-38.
behaviour of, in enamel
mass, 127.
Topaz, 15.
Transfers, decoration by, 165, 166.
Translucent coloured enamels,.
177, 178.
U.
Uranium, colour reactions of, 85.
oxide pigment, 56.