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Drypoint is a printmaking technique of the intaglio family, in which an image is incised into a plate (or "matrix") with a hard-pointed "needle" of sharp metal or diamond point. In principle, the method is practically identical to engraving .
ferric chloride may be used for etching copper or zinc plates, whereas nitric acid may be used for etching zinc or steel plates. Typical solutions are 1 part FeCl 3 to 1 part water and 1 part nitric to 3 parts water. The strength of the acid determines the speed of the etching process. The etching process is known as biting (see also spit ...
Goya, No. 32 of Los Caprichos (1799, Por que fue sensible).This is a fairly rare example of a print entirely in aquatint. [5]In intaglio printmaking techniques such as engraving and etching, the artist makes marks into the surface of the plate (in the case of aquatint, a copper or zinc plate) that are capable of holding ink.
Etching prints are generally linear and often contain fine detail and contours. Lines can vary from smooth to sketchy. An etching is opposite of a woodcut in that the raised portions of an etching remain blank while the crevices hold ink. A non-toxic form of etching that does not involve an acid is Electroetching.
Much greater pressure is then needed to force the paper into the channels containing the ink, so a high-pressure press is normally needed. Intaglio techniques include engraving, etching, and drypoint. In the planographic family of printing, the entire surface of the matrix is flat, and some areas are treated to create the print image. [1]
A spray is a dynamic collection of drops ... there is a significant difference between the velocity of larger and smaller drops. ... Spraying etching chemicals and ...
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Detail of an etching of 1841 with surface tone on the structure at right, and its shadow (the whole print).. In printmaking, surface tone, or surface-tone, [1] is produced by deliberately or accidentally not wiping all the ink off the surface of the printing plate, so that parts of the image have a light tone from the film of ink left.