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GROUP I

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Originally appearing in Volume V21, Page 598 of the 1911 Encyclopedia Britannica.

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GROUP

GROUP I . Elements.—All the See also:

black See also:

PIGMENTS (Lat. pigmentum, from pingere, to paint)

pigments in See also:

ORDINARY (med. Lat. ordinarius, Fr. ordinaire)

ordinary use—See also:

ivory black, See also:

LAMP (from Gr. Xag ras, a torch, Xaµaav, to shine)

lamp black, See also:

CHARCOAL

charcoal black, See also:

INDIAN

Indian See also:

INK (from Late Lat. encaustum, Gr. gysavorov, the purple ink used by Greek and Roman emperors, from iyKaiew, to burn in)

ink, and See also:

GRAPHITE

graphite, less correctly termed black-See also:

lead and See also:

PLUMBAGO (from Lat. plum-bum, lead)

plumbago—consist of or contain See also:

CARBON (symbol C, atomic weight 12)

carbon, an See also:

ELEMENT (Lat. elementum)

element not liable to See also:

CHANGE (derived through the Fr. from the Late Lat. cambium, cambiare, to barter; the ultimate derivation is probably from the root which appears in the Gr. «a urmu', to bend)

change. The metallic pigments, See also:

gold, See also:

SILVER

silver, See also:

ALUMINIUM (symbol Al; atomic weight 27.0)

aluminium and See also:

PLATINUM [symbol Pt, atomic weight 145.0 (0=16)]

platinum, belong here; of these, silver alone is easily susceptible of change, tarnishing by See also:

COMBINATION (Lat. combinare, to combine)

combination with See also:

SULPHUR

sulphur. Gaoue II. Oxides.—The oxides have generally been formed at a high temperature See also:

ANA

ana are not easily amenable to See also:

PHYSICAL

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:

ZINC

zinc See also:

white, See also:

green See also:

CHROMIUM (symbol Cr. atomic weight 52.1)

chromium See also:

OXIDE

oxide, burnt See also:

UMBER

umber (a mixture of See also:

IRON [symbol Fe, atomic weight 55.85 (0=16)]

iron and See also:

MANGANESE (symbol Mn; atomic weight, 54.93 (0=16)], a metallic chemical element. Its dioxide (pyrolusite)

manganese oxide), See also:

COBALT (symbol Co, atomic weight 59)

cobalt green (CoO,nZnO), cobalt See also:

BLUE (common in different forms to most European languages)

blue (CoO,nAl2O3), coeruleum (CoO,nSnO2), Venetian red, See also:

LIGHT

light red, Indian red and burnt sienna (all chiefly composed of ferric oxide), and red lead (Pb204).

End of Article: GROUP I

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