gas bleaching

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• Bleaching of wood pulp — is the chemical processing carried out on various types of wood pulp to decrease the color of the pulp, so that it becomes whiter. The main use of wood pulp is to make paper where whiteness (similar to but not exactly the same as brightness ) is… …   Wikipedia

• Gas — (g[a^]s), v. t. [imp. & p. p. {Gassed} (g[a^]st); p. pr. & vb. n. {Gassing}.] 1. (Textiles) To singe, as in a gas flame, so as to remove loose fibers; as, to gas thread. [Webster 1913 Suppl.] 2. To impregnate with gas; as, to gas lime with… …   The Collaborative International Dictionary of English

• bleaching fluid — a fluid prepared by passing chlorine gas into an emulsion of calcium hydrate …   Medical dictionary

• Carbureted hydrogen gas — Hydrogen Hy dro*gen, n. [Hydro , 1 + gen: cf. F. hydrog[ e]ne. So called because water is generated by its combustion. See {Hydra}.] (Chem.) A gaseous element, colorless, tasteless, and odorless, the lightest known substance, being fourteen and a …   The Collaborative International Dictionary of English

• Paperboard — Corrugated fiberboard made from paperboard Paperboard is a thick paper based material. While there is no rigid differentiation between paper and paperboard, paperboard is generally thicker (usually over 0.25 mm/0.010 in or 10 points)… …   Wikipedia

• Gassed — Gas Gas (g[a^]s), v. t. [imp. & p. p. {Gassed} (g[a^]st); p. pr. & vb. n. {Gassing}.] 1. (Textiles) To singe, as in a gas flame, so as to remove loose fibers; as, to gas thread. [Webster 1913 Suppl.] 2. To impregnate with gas; as, to gas lime… …   The Collaborative International Dictionary of English

• Gassing — Gas Gas (g[a^]s), v. t. [imp. & p. p. {Gassed} (g[a^]st); p. pr. & vb. n. {Gassing}.] 1. (Textiles) To singe, as in a gas flame, so as to remove loose fibers; as, to gas thread. [Webster 1913 Suppl.] 2. To impregnate with gas; as, to gas lime… …   The Collaborative International Dictionary of English

• environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …   Universalium

• technology, history of — Introduction       the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …   Universalium

• Black, Joseph — ▪ British scientist Introduction born April 16, 1728, Bordeaux, France died Nov. 10, 1799, Edinburgh, Scot.  British chemist and physicist best known for the rediscovery of “fixed air” ( carbon dioxide), the concept of latent heat, and the… …   Universalium

• Sodium hypochlorite — Sodium hypochlorite …   Wikipedia