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(graphic arts)
The process of making an electrotype.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(in Russian, gal’vanostereotipiia), a method of making copies of the forms for letterpress printing (stereotypes) by galvanoplastics. It was used for the first time in the world in 1839 to duplicate printed forms at the ekspeditsiia (separate administrative branch or subdivision) for the preparation of government papers in St. Petersburg.

Electrotyping involves the making of a matrix, the electrolytic deposition of a metal (usually copper) on the matrix to obtain the printing form (when the deposited metallic layer reaches the necessary thickness of 0.25 to 0.30 mm, it is separated from the matrix), and finishing. Electrotyping gives a more accurate reproduction of the original (base) form than the usual cast stereotype. The wear resistance of copper electrotyping stereotypes is sufficient to give 200,000-250,000 impressions (zinc stereotypes give 25,000-30,000 impressions). After additional coating with a thin layer of iron or nickel, an electrotype can give 1 million impressions. The method is used mainly for printing books and periodicals containing a large number of illustrations, as well as for high-circulation color reproductions.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The development of electroplating and electrotyping in the 1840s coincided with a vogue for naturalism, leading to the creation of realistic-looking models of plants and animals.
This piece is knowledgeable, but gappy, omitting the growing popularity of lithography and its typographical successor chromolithography, as well as the impact of technological innovations such as electrotyping and the gravure processes.
Bible publishing was on the cutting edge of print technology throughout the early 1800s, often pioneering such innovations as in-house binding, permanent type sets, power presses, copper plates for illustrations, and electrotyping to place pictures and text on the same page.
Without denying the significance of such highly touted supply-side inventions as the steam-driven flatbed press, stereotyping, and electrotyping, Zboray also notes the equally important if usually overlooked demand-side improvements in eyeglasses and lighting.
Departments existed for "superintendents, accounting, advertising, editoria, circulation, main press, power, engraving, composing, electrotyping, job press, proofreading, pattern, shipping, folding, stencil, subscription, agents, installment." (39) At the Ladies' Home Journal Bok had an editorial staff of thirty-five working for him, and Theodore Dreiser had thirty-two people under him when he edited Delineator from 1907 to 1910.
This was the method in general use for casting bronze sculptures until the invention of electrotyping in the 19th century, which allowed a thin layer of bronze to be deposited by electrolysis onto a mould, although better quality bronzes were still made using the old methods.
In 1858 Hermann Berthold (died 1904) established an electrotyping plant in Berlin, to which he added a typefoundry.
The scope of the bibliography included works "treating of typographic, lithographic, copperplate printing, &c., with the cognate arts of type-founding, stereotyping, electrotyping, and wood-engraving" (Prospectus of 1880, p.