Online Encyclopedia

Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.

GROUP I

Online Encyclopedia
Originally appearing in Volume V21, Page 598 of the 1911 Encyclopedia Britannica.
Spread the word: del.icio.us del.icio.us it!

See also:

GROUP I  . Elements.—All the See also:black See also:pigments in See also:ordinary use—See also:ivory black, See also:lamp black, See also:charcoal black, See also:Indian See also:ink, and See also:graphite, less correctly termed black-See also:lead and See also:plumbago—consist of or contain See also:carbon, an See also:element not liable to See also:change . The metallic pigments, See also:gold, See also:silver, See also:aluminium and See also:platinum, belong here; of these, silver alone is easily susceptible of change, tarnishing by See also: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:zinc See also:white, See also:green See also:chromium See also:oxide, burnt See also:umber (a mixture of See also:iron and See also:manganese oxide), See also:cobalt green (CoO,nZnO), cobalt See also: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) .

End of Article: GROUP I
[back]
GROUP
[next]
GROUP II

Additional information and Comments

There are no comments yet for this article.
» Add information or comments to this article.
Please link directly to this article:
Highlight the code below, right click and select "copy." Paste it into a website, email, or other HTML document.