NASA NTRS · 19850000133
Copyboard Quickly Makes Clean Printing Plates
Abstract
Vacuum-chuck eliminates glass and sponge artwork support. Vacuum copyboard allows camera-ready original slid on top plate for proper positioning, then holds securely for photography. Bleed valve allows vacuum in copyboard box adjusted for small or large originals. With new copyboard, time-consuming and costly procedures unnecessary.
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Balandis, W. D.. 1985-06-01. Copyboard Quickly Makes Clean Printing Plates. https://ntrs.nasa.gov/citations/19850000133
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