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Contact Printing - 14209_286
Contact Printing Procedure - 14209_288

Photography (Basic) - Introduction to photography and other graphic techniques
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Figure 11-2.–Contact printing arrangement. source, and some sort of padding. For large volume and fine   printing   control,   a   specially   designed   and constructed contact printer is used Glass and Pad For  you  to  make  contact  proof  sheets  and  an occasional  contact  print  job,  only  a  glass  and  a supporting  pad  are  necessary.  “Contact  printers,” consisting of a sheet of glass hinged to a metal frame and a pad assembly, are generally known as proof printers (fig. 11-1). When such a device is not available or is not large enough for the negatives to be contact printed, a piece of 1/4-inch plate glass and soft padding (such  as  a  rubber  typewriter  pad)  can  be  used. Quarter-inch plate glass is heavy enough to keep the negatives and paper flat and in contact during exposure. The glass must be free of flaws, scratches, bubbles, and dirt. For color contact printing, the glass should be water white or crystal grade; otherwise, filtration is required to overcome the color tint of the glass. The edges of the glass should be beveled and the corners slightly rounded or taped. This is a safety measure to prevent cuts when the  glass  is  being  handled. The pad should be at least as large as the glass. The pad provides a cushioned surface to press the paper and negative together under pressure from the glass. To use either the proof printer or the glass and pad to make contact prints, you should place the printing paper  emulsion  side  up  on  the  pad  material.  The negatives are then placed emulsion side down on the paper and the glass is positioned on top. Then turn on 303.47 Figure 11-3.–Using an enlarger as a light source for contact printing. the exposing light (fig. 11-2). This, of course, is done in the  darkroom  under  suitable  safelight  illumination. Adequate pressure must be kept on the negative and print paper so their entire surfaces are in contact during the exposure. Any separation between the negative and the paper results in an unsharp point in the image. The light source may be any controlled lamp for printing with a proof printer or glass and pad. An overhanging light bulb or a safelight, with the filter removed,  connected  to  a  timer  is  a  convenient arrangement. In most Navy imaging facility print rooms, an enlarger is used as the light source (fig. 11-3). Contact  Printer For  large  volume  contact  printing,  a  contact  printer is  more  convenient.  A  contact  printer  is  basically  a  box with  exposing  lights,  safelights,  and  viewing  lights inside with a glass top. It has a hinged pressure cover to hold the negative and paper in contact during exposure. Switches on the printer control the lights in the printer or the printer may have a built-in timer. Also, the contact printer  may  be  connected  to  an  external  timer. Contact printers are all built around the same basic idea. However, consult the manufacturer’s instructions 11-3







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