A manual of photo-engraving : containing practical instructions for producing photo-engraved plates in relief-line and half-tone with chapters on dry plate development and half-tone color work (1896)
Jenkins, H. (Harry), 1868- · Chicago : Inland Printer · leaf 28
e varnish. Fordeveloping prints on zinc, any ordinary sheet metaltray will serve the pur-pose. For half-toneetching porcelain or rub-ber trays may be used. PRINTING FRAMES. For printing onmetal there are specialframes, so constructedthat equal contact withthe negatives can be obtained for all parts… … PRINTING FRAME. 14 MANUAL OF PHOTOENGRAVING.
Photoengraving · Color photography
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