Pigment carbon

Carter Also known as H.T.S. Carter. A proces for making basic lead carbonate pigment (white lead). Lead monoxide, in a slowly revolving drum, is moistened and sprayed with acetic acid. Carbon dioxide is then introduced. Carbonation is subsequently completed in a separate vessel. See also Dutch, Thompson-Stewart. 

Dutch An obsolete process for making basic lead carbonate pigment (white lead) by exposing metallic lead to vinegar and carbon dioxide. Reportedly first described by Theophrastos around 300 BC. Also known as the Stack process because the metal ingots were arranged in vertical stacks. See also Thompson-Stewart. 

The normal dispersants used for both kaolin and calcium carbonate pigments are aqueous solutions of sodium polyacrylate. These are prepared by free radical polymerisation using various combinations of initiators and terminators which may be proprietary to the manufacturer. Number average molecular weights are... 

Currently, use of basic lead carbonate is limited to artificial pearls, buttons, and bijouterie. Due to the low chemical stability of this pigment and toxicity problems, it is being increasingly replaced by bismuth oxychloride and mica-based pigments. Worldwide production of basic lead carbonate pigment in 1995 was ca. 10001. 

If egg tempera paints remain from Activity 2.5, they should be used. If not, follow Activity 2.5 to prepare egg tempera paints. (In Activity 2.5, students combined pigments with binders to make paints.) These paints will be blue (cobalt carbonate pigment), deep blue (azurite pigment, 2CuC03 Cu(0H) 2), and black (carbon pigment). 

Positive wet microchemical and microscopic identifications were permitted for the copper greens on only two of the Chinese silks. In both cases the result was the copper carbonate pigment malachite, which confirmed that Chinese copper greens were malachite and the Western ones were verdigris. A positive identification should be performed whenever conservation conditions permit it and trained personnel are available (7). 

Fig. 21.7 Carbon pigment deposits in portal macrophages. Clinical diagnosis pronounced anthracosis...

Slab Dq> AC699. [Ayer s Cliff] Calcium carbonate pigmented powder widi dispersants rubber slab dipping system for rubbo industry. 

Conductive organic coatings consist of a conductive carbon pigment in an organic binder. The most widely used systems have been solvent based. There are also water-based systems which have been developed more recently. One proprietary system uses a nickel coated carbon fibre rather than flaked graphite. 

Chem. Descrip. Polycarboxylic acid type Uses Dispersant for calcium carbonate, pigments for paper coating and syn. pulp vise, reducer dispersant for paints, pigments, inks Properties Liq. anionic 40% act. 

Synonyms Allied whiting Calcium carbonate (INCI) Calcium carbonate (1 1) Calcium carbonate, precipitated Carbonic acid calcium salt Carbonic acid calcium salt (1 1) Cl 77220 Monocalcium carbonate Pigment white 18 Precipitated calcium carbonate Precipitated chalk Prepared chalk Vienna white White powder Whiting Classification Inorganic salt Empirical CCaOj Formula COj Ca... 

CAS 7782-42-5 EINECS/ELINCS 231-955-3 Synonyms Black lead Cl 77265 Graphite, natural Mineral carbon Pigment black 10 Plumbago Silver graphite Stove black Definition The crystalline allotropic form of carbon occurs naturally (esp. in Canada, Ceylon), or produced synthetically from petroleum coke by heating to = 3000 C in an elec, resist, furnace Empiricai C... 

CAS 7782-42-5 EINECS/ELINCS 231-955-3 Synonyms Black lead Cl 77265 Graphite, natural Mineral carbon Pigment black 10 Plumbago Silver graphite Stove black... 

Oil paints solvent-lfee No. 665 standard oils, calcium carbonate, pigments, siccatives, lemon oil water-soluble exterior coating (paneling)... 

PET/CPET) silicates, carbonates, pigments Organic compounds, carboxylic acids, diphenylamine Polymers, mainly polyolefins, PE, PP, ethylene and styrene copolymers, ionomers... 

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