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acrylic

acrylic  

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A modern synthetic paint, made with a resin derived from acrylic acid, that combines some of the properties of oils and watercolour. It was the first new painting medium in centuries and has become a ...
craquelure

craquelure  

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A network of small cracks that appears on the surface of a painting when in the course of time the paint or varnish has become brittle.
dipper

dipper  

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A small container, usually made of metal, that clips onto the edge of the oil painter’s palette and holds medium or diluent. They are often made in pairs—a ‘double dipper’. The American term is ...
emulsion

emulsion  

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A liquid in which water is combined with an oily or resinous substance in such a way that they will not separate out. Oil proverbially will not mix with water, but if an emulsifying agent—such as ...
glair

glair  

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A term for white of egg when used as the medium in illuminating manuscripts, in tempera painting, and in gilding with gold dust. It is also used as an adhesive substance to fix gold leaf.
gum

gum  

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A sticky liquid exuded by certain trees and shrubs. Gum has been used as a painting medium since ancient times. It is the normal medium of watercolour (see gum arabic) and pastel.
gum arabic

gum arabic  

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A gum exuded from trees of the genus Acacia. Structurally it is a heteroglycan containing d‐galactose, l‐arabinose, l‐rhamnose, and d‐glucuronic acid. It is used in industry, e.g. in the manufacture ...
linseed oil

linseed oil  

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A pale yellow oil pressed from flax seed. It contains a mixture of glycerides of fatty acids, including linoleic acid and linolenic acid. It is a drying oil, used in oil paints, varnishes, linoleum, ...
lustre

lustre  

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Of minerals, the ability to reflect light. The quality and nature of the reflection may be a useful diagnostic aid. The term ‘lustre’ is often used in conjunction with the qualifying terms ...
megilp

megilp  

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A painting medium consisting of mastic varnish mixed with linseed oil. It makes paint glossy and easy to manipulate, for which reason it was popular in the 18th and 19th centuries; however, it is a ...
oil paint

oil paint  

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Paint in which drying oils are used as the medium; linseed oil is the best known, but others that have been used in painting include poppy oil and walnut oil. It was long believed that oil painting ...
paint film

paint film  

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A thin, continuous layer of medium and pigment combined.
pigment

pigment  

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Any substance used as a colouring agent, particularly the finely ground particles that when held in suspension in a medium constitute a paint. Most pigments are now manufactured synthetically, but in ...
poppy oil

poppy oil  

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Oil extracted from poppy seeds, one of the most popular of the drying oils used as a medium for oil painting. It is less viscous than linseed and walnut oil and does not easily turn rancid. It is, ...
refractive index

refractive index  

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A measure of the degree of refraction of light or other radiation at the interface of two media, equal to the ratio of the sine of the angle of incidence to the sine of the angle of refraction, which ...
resin

resin  

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A natural resin is a sticky flammable organic substance, insoluble in water, exuded by certain plants and trees (notably fir and pine). Synthetic resins can also be manufactured. Resins are mainly ...
scientific examination

scientific examination  

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1. PaintingsScientific and technical examination of paintings is usually carried out to provide information on their structure and ma terials. This physical evidence can then be used to elucidate ...
size

size  

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Glue made from animal products (such as skin or bone), or, more loosely, any fairly weak glue. It is used in art mainly for filling the porous surface of wooden panels or canvases to provide a ...
studio equipment (painting)

studio equipment (painting)  

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The tools, equipment, and props found in a painter's studio are the emblems of his art, frequently used in portraits to indicate his occupation. The artist's studio has long been ...
support

support  

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The material—canvas, wooden panel, paper, or other substance—on which a painting or drawing is executed; usually a support is prepared with a ground before paint is applied.

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