Abstract
THE author describes his work in the Sub-title as being “a practical manual of engraving in half-tone on zinc, copper, and with a chapter on througly revised the work and added to it so that it is as far as possible the making and prooing of half-tone blocks as at present practised. the subject is treated in a strictly practical way, obsolete methods and historical details find no place in it, nor does the author venture into the future. Apparatus that every worker must buy is not described with excessive minuteness, but such information as is necessary for using it to the best advantage is dearly set forth. No theoretical considerations are introduced, except in connection with such matters as the cross-lined screen and the management of electric arc lights, and then only in the simplest manner as being the best guide to the intelligent use of the apparatus. After ten chapters on appliances, the author describes with all necessary formulae the operations of making the negative, printing, etching, finishing, mounting, and proofing the plates. The chapter on the three-colour half-tone process assumes a general knowledge of the principles involved, and refers only to the additional manipulation necessary. The two examples of three-colour work are not much credit to the process, but the other illustrations, which are numerous, are useful and good.
The Half-tone Process.
By Julius Verfasser. Fourth edition. Pp. 348. (London: Iliffe and Sons, Ltd., 1907.) Price 5s. net.
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The Half-tone Process . Nature 76, 587 (1907). https://doi.org/10.1038/076587c0
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DOI: https://doi.org/10.1038/076587c0