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COLOPHONY 0.1 kg

$5.00

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Weight: 0.1 kg

Used in mezzotint to give work a grainy look. Colophony or rosin in powdered form is an ingredient in commercial printing inks, photocopying and laser printing paper, varnishes and adhesives.

Also called rosin or Greek pitch, colophony is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporise the volatile liquid terpene components. It chiefly consists of various resin acids, especially abietic acid.

Colophony varies in color, according to the age of the tree from which the turpentine is drawn and the degree of heat applied in distillation, from an almost pitch-black substance through grades of brown and yellow to an almost perfectly transparent colorless glassy mass. The commercial grades are numerous, ranging by letters from A (the darkest) to N (extra pale), superior to which are W (window glass) and WW (water-white) varieties, the latter having about three times the value of the common qualities. This colophony is grade N which is most suited to visual art applications.

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COLOPHONY

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Weight 0.1 kg