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Höchst
(Encyclopedia)Höchst hökhst [key], industrial district of Frankfurt, in Hesse, central Germany. It is a leading center of the German chemical industry and was formerly the site of the I. G. Farben chemical and dy...adsorption
(Encyclopedia)adsorption, adhesion of the molecules of liquids, gases, and dissolved substances to the surfaces of solids, as opposed to absorption, in which the molecules actually enter the absorbing medium (see a...archil
(Encyclopedia)archil ôrˈ– [key], blue, red, or purple dye extracted from several species of lichen, also called orchella weeds, found in various parts of the world. Commercial archil is either a powder (called ...Hawick
(Encyclopedia)Hawick hôˈîk [key], town, Scottish Borders, S Scotland, on the Teviot River. The largest S...catechu
(Encyclopedia)catechu kătˈəcho͞o [key] or cutch, extract from the heartwood of Acacia catechu, a leguminous tree of the pulse family, native to India and Myanmar. Catechu is a fast brown dye used for various sh...saffron
(Encyclopedia)saffron, name for a fall-flowering plant (Crocus sativus) of the family Iridaceae (iris family) and also for a dye obtained therefrom. The plant is native to Asia Minor, where for centuries it has bee...sodium thiosulfate
(Encyclopedia)sodium thiosulfate, Na2S2O3, colorless crystalline compound that is more familiar as the pentahydrate, Na2S2O3·5H2O, an efflorescent, monoclinic crystalline substance also called sodium hyposulfite o...madder
(Encyclopedia)CE5 Bluet, Houstonia caerulea, a member of the madder family madder, common name for the Rubiaceae, a family of chiefly tropical and subtropical trees, shrubs, and herbs, especially abundant in N ...pyroxylin
(Encyclopedia)pyroxylin pīrŏkˈsĭlĭn [key], partially nitrated cellulose (see nitrocellulose). It is used in lacquers, plastics, and artificial leathers. Pyroxylin lacquers are made by dissolving pyroxylin in a...cornflower
(Encyclopedia)cornflower, common herb (Centaurea cyanus) of the family Asteraceae (aster family). It is a garden flower in the United States but a weed in the grainfields of Europe. It is called bluebottle or bluet...Browse by Subject
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