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Colourants and colouring

A language of chemicals is proposed, and this language is expressed in their behaviour. It is almost as if the chemist does not participate in this image production, this chemical articulation, when chemistry itself announces, Anch io sono pittore , but more proudly than Michelangelo, for it does its work without a brush. Artists could learn from this, notes Runge, for here appear colours and colour combinations that have never been seen before.31 These shapes and colours follow a lawfulness beyond human capriciousness. [Pg.58]

As regards the half-tone colouring and colour intensity, blue is used - as far as possible - for normal findings, classification, causes, indications, therapy regimen, etc., red applies to pathological findings, contraindications, complications, side effects, etc., yellow to methods, test procedures, etc., and grey to historical details. [Pg.916]

Polyamine-cured epoxy systems have reasonable colour and colour retention, improved physical properties and good chemical resistance. They are, however, moisture sensitive, relatively toxic and have poor resistance to organic acids. Examples of this class are diethylene triamine (DETA) and triethylene tetramine (TETA). [Pg.31]

Colour and colour stability Viscosity Pot life Low temp- ature cure Surface Him look Film flexibility Adhesion Chemical resistance Acids Solvents Water ... [Pg.33]

Owing to the absence of unsaturation, cycloaliphatic amines provide high weatherability and high resistance to yellowing under heat. Cycloaliphatic amines can cure even under damp conditions. The cured system exhibits excellent gloss, excellent colour and colour stability, good... [Pg.33]

This paper reviews recent findings on the products and mechanisms of these reactions, the major factors determining their relative importance and their consequences on wine colour and colour stability. [Pg.69]

Andersen HJ, Bertelsen G, Skibsted LH, Colour and colour stability of hot processed frozen minced beef. Results from chemical model experiments tested under storage conditions, Meat Science, 1990, 28, 87-97. [Pg.351]

Colour and colour uniformity are two of the main parameters that define the direct quality of a vegetable. Colour is often taken as an index of freshness, palatability and nutritional value (Haisman and Clarke, 1975). Colour affects the pleasantness and acceptability of a food and interferes with judgements of sweetness, bitterness, saltiness and flavour intensity (Clydesdale, 1993). [Pg.179]

COHEN J B (1988) Colour and colour mixture Scalar and vector fundamentals. [Pg.364]

The critical step for gel coat production is the dispersion of the pigments to the base resin to give the right colour and colour solidity. The latter is important to prevent show through of the fibre reinforcement and to obtain consistency of finish. Bead mills and roller mills are used for the dispersion of pigments and additives. [Pg.309]

Rock colours and colour index numbers in brackets are according to the Rock Colour C Chart published by Geol. Soc. of Amer. [Pg.321]

Very high output rates are required in cable production. Akcros Chemicals offers a calcium-zinc product under the name Interlite 6088/6012, designed to improve initial colour and colour stability, while facilitating high-speed cable extrusion. [Pg.124]

Winkler, C. A., and Hopkins, J. W. 1940. Canadian Wiltshire bacon. XII. Effect of heat treatment on the colour and colour stability of bacon. Can. J. Research 18D, 289. [Pg.52]

Woodcock, A. H., and White, W. H. 1943. Canadian Wiltshire bacon. XXIII. The effect of concentration of curing salts on colour and colour stability. Can. J. Research 21, 85. [Pg.52]

Cook, W. H. 1941. Canadian Wiltshire Bacon. XVI. Colour and colour stability of pork after frozen storage and conversion to bacon. Can. J. Research 19 (Sect. D), 85. [Pg.257]

Most recently Beaupre et al. developed a flexible electrochromic device using textile in 2006 [71]. The structure is made with a transparent electrode, covered with spray-coated electrochromic polymer, a gel electrolyte and finally with a conductive textile. The textile electrode is made with a textile fabric coated with copper and nickel. The other electrode is made of glass or polyester (PET) coated with ITO. Two electrochromic conductive polymers have been tested. Similar colours and colour changes are obtained for structures using two PET-ITO electrodes, or two glass-ITO electrodes, or one textile electrode with one PET-ITO electrode. The colour change is visible but slow. When a plastic electrode and a textile electrode are used, the structure is flexible. A similar structure, using a copper-coated textile cathode, was described by Zhan et al. in 2013 [72]. [Pg.555]

The use of colour-measuring instruments allows specification and communication of colour by means of international standard terms such as CIE L a b C h°. Colour difference values can also be determined instrumentally and, if optimized colour difference equations are used, can out-perform a single trained colourist. However, the visual appreciation of colour and colour difference is still a subjective response, affected by many factors. Care must be taken to include measurement conditions in the interpretation of colour measurement data. The gold standard answer must always be that which agrees with the majority of a group of human observers. Whether this can be achieved by optimized equations based on CIE L a b colour space or by colour appearance models remains to be established. [Pg.343]

Maxweii, James Cierk (1831-79) A Scottish physicist and mathematician noted for his pioneering work on the kinetic theory of gases and electromagnetism. He was known affectionately at school as dafde and at fifteen he had a mathematical paper read to the Royal Society of Edinburgh. He retired in i865 as professor at Aberdeen and London, but in 1871 he was recalled to be the first professor of experimental physics at Cambridge where he also prepared plans for the Cavendish Laboratory that was named after the Hon. Henry Cavendish (1731-1810). He also made major contributions to astronomy, colour, and colour-blindness. [Pg.232]

Methyl methacrylate (MMA) which, in addition to exterior durability, contributes hardness, tensile strength, good colour and colour stability to the coating. [Pg.180]

Certain thermoplastic acrylics are compatible with medium and long oil alkyds, and can be used to improve the colour and colour retention of decorative alkyd paints, whilst shortening drying time and increasing hardness. This, however, is achieved at the expense of paint solids content. [Pg.218]

Alkyds can be used in combination with either acrylamide or hydroxy functional acrylics. Very often this results in an improvement in application solids. However, the alkyd must be carefully chosen, firstly in terms of compatibility with acrylics, and secondly from the point of view of what it will contribute to (or detract from) film performance. Clearly, the colour retentive alkyds are most likely to be selected so that the excellent colour and colour retention of the acrylic is not compromised. [Pg.232]

A large number of resins can be used to modify the properties of the two pack acrylic system. The most common are high viscosity hard resins with good colour and colour retention, which are added to achieve quicker initial drying and earlier handleability of the coated object. Those frequently used are ... [Pg.296]


See other pages where Colourants and colouring is mentioned: [Pg.13]    [Pg.32]    [Pg.32]    [Pg.472]    [Pg.35]    [Pg.339]    [Pg.342]    [Pg.352]    [Pg.352]    [Pg.13]    [Pg.522]    [Pg.2]    [Pg.195]    [Pg.500]    [Pg.887]    [Pg.186]   
See also in sourсe #XX -- [ Pg.192 , Pg.415 , Pg.416 , Pg.438 ]




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