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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 Excerpt: ...at this stage, it would be flat and without life. The lines being wider in the parts that represent the high lights, than those that designate the dark portions. After the first exposure is made, remove the holder from the camera, and take it to the dark room. Lean against the wall with the slide next to you. Pull out the slide and remove the screen plate No. 1 and insert in its place No. 2, care being taken not to move the kit, and have the ruled side of the screen next to the sensitized plate. Plate holder is again inserted in the camera, and placed in exactly the same position as at first. The exposure is now completed and taken to the dark-room, developed, fixed and intensified the same as for line work. By closely examining the plate, the second exposure will be found to have acted on those parts of the plate that represent the lightest colors in the photograph, giving it life. If the plates have been properly separated and the exposure has been correct, those parts that are the lightest on the copy will be represented in the negative by a small transparent dot, scarcely visible to the naked eye. As the color begins to change to the darker parts, the dots increase in size accordingly until they run into the darkest parts, when they disappear entirely. In fig. 32 is shown the position the plates are in while the exposure is being made. A represents the copy, the dotted line B is the screen plate and the solid line C is the sensitized plate. Operating Cross Lined Or Stipple Plates. The operations are carried through with the cross lined plates, as with the single lined, with the exception that the negative is completed with one exposure. With these plates the same appearance of the finished engraving is always the same, while with single lines different ...
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Descripción Condición: New. New. Book is new and unread but may have minor shelf wear. Nº de ref. del artículo: Z1-J-027-00807