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Turbidity – clarity of pigments is measured by light refractive index (refractive index) and size of colored particles. 1) The refractive index of a substance is the ability to deflect light when light shines on it. For white, the higher the index of refraction and the closer the particle size to the optimal size, the […]
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I roughly translated this method as “vinegar & compost” (“stack” Dutch method). Lead leaves are placed on the bottom of terracotta pits with separate bottom compartments to contain vinegar (acetic acid) (about one-third flooded). The lead vessels are then submerged in horse manure and kept in a sealed house. Decomposed horse manure produces heat and […]
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Colorings are an important ingredient in oil painting technology. a) Pigments: Colored, dry matter particles are called pigments, or organic (inorganic) carbon, or inorganic, often without very weak permeability or permeability on material surfaces. that they come into contact with. So adhesive is needed to hold them on those surfaces (on paper, canvas, wood, etc.). […]
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In 1766 the British insect researcher and graphic artist Moses Harris (1730 – 1788) published a book called “The Natural System of Colors,” in which he built a dice wheel based on 3. primary colors red, yellow and blue. He was the first to propose the idea of the contrast between complementary colors, and put […]
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The development of oil painting techniques is closely linked to the evolution of Western painting. Usually this development, presented in chronological order, goes from Renaissance, Mannerism, Baroque, Classic, New Classical, to Romance, Impressive, Post-Impressive, Modern, Post-Modern. Brian Thomas’s book “Vision and tecniques in European painting” (Longmans, Green & Co., London, 1952) examined the development of […]
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Newton’s color wheel only shows the change in hue and saturation of each color, not the way the darkness of the colors changes. Eighteenth-century theorists expect to build color models that guarantee four criteria: i) the model must classify all colors that can be created by a combination of primary colors, called primary colors, ii) […]
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Among the film oils used in the oil paints mentioned above, linseed oil has the highest linolenic acid and iodine content (see table), so linseed oil dries the fastest and has the toughest film. Dry walnut oil is also fairly quick and even, with less yellowing, so it is used to grind light colors. Poppy […]