Identifier: halftoneprocessp00verf (find matches)
Title: The half-tone process. A practical manual of photo-engraving in half-tone on zinc, copper, and brass
Year: 1904 (1900s)
Authors: Verfasser, Julius
Subjects: Photoengraving
Publisher: London, Iliffe & sons, limited
Contributing Library: Getty Research Institute
Digitizing Sponsor: Getty Research Institute

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ithout previous knowledge, shouldhave a clear conception of what is meant by theterm half-tone in its application to the making ofblocks by photographic processes. Now, in a photograph, or in a black and whitedrawing, the shades of colour between light and shadoware termed half-tones, and it is only possible to re-produce these half-tones in relief blocks for letterpressprinting by means of a graduated grain, or by finelines, or by tiny dots of varying size. The half-tone process, as commonly understood,is a method by which half-tones are reproduced infine dots of varying size, formed by means of a net-work of lines ruled on glass and placed in front ofthe sensitive plate when making the photographicnegative. It would, on first consideration, seem probable thatthe effect of placing the network of lines in front ofthe plate would be to cut up the image into tinysquares, which would be all of the same size, onlyvarying in density according to whether the square 14 THE HALF-TONE PROCESS.
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