Photoengraving

Ultraviolet cross-linking of PVA with dichromates is the basis for its use in photoengraving, screen printing, printed circuit manufacture, and color-television tube manufacture. 

RoUed-zinc products in the form of strip, sheet, wire, and rod have many and varied commercial appUcations. Strip is formed into dry-ceU battery cans, mason jar covers, organ pipes, grommets, eyelets, and many other objects, some of which are subsequentiy brass or chromium plated (jewelry, medaUions, bathroom accessories, etc) (132). The zinc—carbon dry-ceU appUcation accounts for about one half the roUed-zinc consumption in the United States (see Batteries). Sheet zinc is used in photoengraving and also in the constmction of roofing and other architectural uses. Special high grade zinc with a... 

Lichtdruck, m. photomechanical printing photographic printing, -gelatine, /. photoengraving gelatin. 

The chemical reactivity of metallic Mg has been utilized in several ways. It is employed in the reduction step in the manufacture of Ti, in the deoxidation and desulfurization of steels and in the nodularization of cast iron. It has also been used for the preparation of photoengraving plates, in dry batteries, and as a sacrificial anode for cathodic protection of other metals. 

Used in the manufacture of pharmaceuticals, dye intermediates, explosives, various inorganic and organic nitrates, nitro compounds and used industrially for ore flotation, metallurgy, photoengraving, and reprocessing spent nuclear fuel. 

Photoresist and photoengraving processes have been described and used in industry for well over 100 years. In 1826, W. H. F. Talbott received a British patent (No. 565) on a photoetching process used to... 

Uses. Production of fertilizers in the form of ammonium nitrate photoengraving steel etching dye intermediates explosives... 

Ammonium dichromate is used in pyrotechnics in photoengraving and lithography as a source of pure nitrogen in the laboratory and as a catalyst. 

Poly(vinyl alcohol) is used in films, coatings, fibers, and as a viscosity modifier of a variety of aqueous systems such as certain cosmetics. Its films, formulated with dichromate salts, may be cross-linked by exposure to ultraviolet light. This property has found application in photoengraving and related fields [6],... 

Photo electron Photo emitter Photoengraving Photoengraving plates Photoetching... 

Photoengraving, 74 Photography, 122 cameras for, 47, 53 films foi 53-55, 127 wet plate collodion process in, 52 Photopolymers, 74, 76 Photoresists, 57, 74, 74-76 negative-working, 75 positive-working, 74-75 Photosynthesis, 40,178 Piezoelectric devices, 208 Piggyback markets, 197,198 PLA (polyflactic acid]), 187-188, 189, 200, 201... 

Mg Auto parts, coatings, photoengraving US, Can., S. Amer., Asia... 

Dowetch [Dow]. TM for magnesium photoengraving sheet, plate, and extruded tube. Also applied to chemicals used in the one-step engraving process. 

Use Pigment for coloring paints, polishes, lacquers, etc. photoengraving, to protect zinc plates from acid. 

Use Manufacture of ammonium nitrate for fertilizer and explosives, organic synthesis (dyes, drugs, explosives, cellulose nitrate, nitrate salts), metallurgy, photoengraving, etching steel, ore flotation, urethanes, rubber chemicals, reprocessing spent nuclear fuel. 

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