What are Pigments ?? Most Common types of Pigments are, Inorganic Pigments Organic Pigments
Art Pigments. Paints All paints have three types of components: Pigments Media Diluents.
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Transcript of Art Pigments. Paints All paints have three types of components: Pigments Media Diluents.
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Art Pigments
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Paints
All paints have three types of components:
Pigments Media Diluents
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Pigments Pigments consist of
small particles of colored compounds.
Are derived from finely ground naturally occurring minerals: rocks and ores.
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Media Media serves to
suspend the pigments and bind them to the surface of the object painted.
Examples are: beeswax, linseed oil, walnut oil, plaster, gum arabic and egg yolk.
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Diluents Diluents such as
water, turpentine, or mineral spirits allow the painter to thin the paint to the best consistency for the work.
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Gemstone Paints The only two blue
pigments available to the medieval artist (between the eighth and the sixteenth centuries) were the very expensive azurite and ultramarine.
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Azurite was Used for Jewelry
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Ultramarine Ultramarine, from
"across the sea", is the pigment from ground lapis lazuli, a semiprecious stone.
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Lapis Lazuli
Beautiful jewelry is made from lapis lazuli.
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Malachite
Malachite is also used for jewelry and pigment.
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Gemstone Makeup Egyptian women
put ground malachite mixed with water on their eyelids (as well as soot around their eyes).
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Cinnabar
Cinnabar is mercury sulfide and dangerous to inhale.
It was used for pigment and jewelry.
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Vermilion Cinnabar Pigment
Cinnabar pigment applied to sculpture and to paper.
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Verdigris
Copper acetate ranging in color from green to blue.
Made by treating copper sheets with the vapors of vinegar, wine, or urine and scraping the resultant corroded crust.
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Earth Colors
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Terre Verte
In medieval painting, it is the light, cold green of celadonite, found chiefly in small deposits in rock in the area of Verona, Italy.
The chief deposits of glauconite, which yield the yellowish and olive sorts, are in Czechoslovakia.
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Burnt Sienna
Iron Oxidein clay
Reddish Brown
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Umbers
Burnt umber is a combination of iron oxide, oxide of manganese and clay, made by burning raw umber to drive off the liquid content.
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Lead White
Lead oxide Very opaque white
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Lead White
Roman women used ground lead powder to make their faces look white.
Roman women wore a face cream made from tin oxide.
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Chinese White
Zinc oxide is derived from smoke fumes. It has very fine particles. It was first introduced in 1840.
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Vine Black
Carbon
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Blue Pigments Recipes for blue
pigments were mentioned extensively in medieval artists' manuals
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Recipes for Blue Old Latin
manuscripts contain recipes for making blue pigments from both copper and silver.
This search for ways to create colors more cheaply is early chemistry.
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Egyptian Blue
It is one of the oldest man-made colors. Commonly found on wall paintings in
Egypt, Mesopotamia and Rome. Calcium copper silicate
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Iron or Prussian Blue The iron blues are the first of the
artificial pigments with a known history and an established date of first preparation.
The color was made by the Berlin colormaker Diesbach in or around 1704.
The material is so complex in composition and method of manufacture that there is practically no possibility that it was synthesized independently in other times or places.
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Prussian Blue Potassium Iron Ferrocyanide
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Tyrian Purple
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Tyrian Purple
Alexander the Great destroyed the city of Tyre by filling its prosperous harbors with silt and killing or enslaving its inhabitants.
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Most Dyes Came from Organic Sources
Mostly plants like indigo for blue or madder root for red.
But also a few animals like cochineal beetles for carmine.
Hampden-Sydney's "garnet and grey" colors date back to the Civil War when the students dyed their civil war uniforms with pokeberries and butternut hickory husks.
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Carmine
A dyestuff precipitated on clay. Made from the ground female Coccus
cacti, or cochineal, insect which lives on various cactus plants in Mexico and in Central and South America.
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Pysanky Natural Dyes
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Types of Paints
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Encaustic The Egyptians, Greeks, and
Romans often used beeswax as the medium for pigments.
The encaustic method was in very common use until the 8th century A.D. and is still used by a few painters today.
In this technique finely ground pigment is mixed in melted wax and applied to the surface.
Waxes are polymers composed predominantly of hydrocarbons.
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Fresco
In fresco painting, the medium and the surface are the same.
An aqueous suspension of the pigment is applied directly to a wet plaster of calcium hydroxide and fine sand.
The pigment is absorbed and is bound into the surface as the plaster dries.
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Egg Tempera
Until the 15th century, egg yolk was used as the most common binder and medium for paints.
Egg tempera is prepared by mixing egg yolks with a slurry of artist's pigment in water.
Enough water is added to provide the proper consistency for painting.
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Oil By the 15th century, oil paints, using
vegetable oils as the medium, replaced egg tempera as the most common paint.
The oil most commonly used is linseed oil which is obtained from the seed of the flax plant.
The oil does not dry but rather is cross-linked where there are carbon-carbon double bonds in the oil.
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Watercolor In water paints, the pigments are
usually very finely ground mineral-based transition metal compounds.
The vehicle is an aqueous solution of gum arabic, a resin prepared from the sap of the African acacia tree.
This resin is a translucent water-soluble polymer.
The resulting paintings usually retain a translucent quality; they appear bright in part because the whiteness of the paper is reflected through layers of the paints.
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Acrylic These paints use an aqueous
suspension of both the pigment and monomers of compounds such as methyl acrylate and vinyl acetate.
The paint does not become plastic until the monomers combine.
In a process similar to the "drying" of oil paints, these monomers are linked together by a chain reaction to form a polymer molecule that is insoluble in both water and most organic solvents.