black pigments in ordinary use—ivory black, lamp black,
See also:charcoal black,
See also:ink, and
See also:graphite, less correctly termed black-lead and plumbago—consist of or contain
See also:carbon, an
See also:element not liable to
See also:change . The metallic pigments, gold,
See also:silver, aluminium and platinum, belong here; of these, silver alone is easily susceptible of change, tarnishing by combination with
See also:sulphur . Gaoue II . Oxides.—The oxides have generally been formed at a high temperature
See also:ana are not easily amenable to
See also:physical or chemical change; they are, moreover, not liable to affect other pigments, being practically inert, red lead only being an exception . The oxides include
See also:green chromium
See also:oxide, burnt
See also:umber (a mixture of iron and
See also:manganese oxide),
See also:cobalt green (CoO,nZnO), cobalt blue (CoO,nAl2O3), coeruleum (CoO,nSnO2), Venetian red,
See also:light red, Indian red and burnt sienna (all chiefly composed of ferric oxide), and red lead (Pb204) .
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