silica pigment
21Aluminium oxide — Alumina redirects here. For the company, see Alumina Limited. This article is about aluminium(III) oxide Al2O3. For other uses, see Aluminium oxide (disambiguation). Aluminium oxide …
22Paint — For other uses, see Paint (disambiguation). Paints redirects here. For the baseball team, see Chillicothe Paints. Dried green paint Paint is any liquid, liquefiable, or mastic composition which after application to a substrate in a thin layer is… …
23Fresco — (plural either frescos or frescoes ) is any of several related painting types, done on plaster on walls or ceilings. The word fresco comes from the Italian word affresco which derives from the adjective fresco ( fresh ), which has Latin origins.… …
24Cobalt blue — This article is about the color. For other uses, see Cobalt blue (disambiguation). Cobalt blue is a cool, slightly desaturated blue color, historically made using cobalt salts of alumina. It is used in certain ceramics (historically, especially… …
25iron processing — Introduction use of a smelting process to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of iron and of its preparation for smelting. Iron (Fe) is a… …
26Natural phenol — Quercetin, a typical flavonoid, is a natural phenol Natural phenols, bioavailable phenols, plant phenolics, low molecular weight phenols or phenoloids[1][2] …
27Ancient Egypt — was an ancient civilization in eastern North Africa, concentrated along the lower reaches of the Nile River in what is now the modern nation of Egypt. The civilization began around 3150 BC [Only after 664 BC are dates secure. See Egyptian… …
28Alternative biochemistry — is the speculative biochemistry of alien life forms that differ radically from those on Earth. It includes biochemistries that use elements other than carbon to construct primary cellular structures and/or use solvents besides water. Theories… …
29Chromatography — Pictured is a sophisticated gas chromatography system. This instrument records concentrations of acrylonitrile in the air at various points throughout the chemical laboratory. Chromatography (from Greek χρῶμα chroma color and γράφειν graphein to… …
30Egyptian faience — is a non clay ceramic displaying surface vitrification which creates a bright blue green luster. It is called Egyptian faience to distinguish it from Faience which refers to the ambiguous term frit and a type of pottery now know as majolica: a… …
