Viewgraphs, ContinuedMaster artworkThe diazo process requires the creation of master artwork. Prepare this arton a good quality, fine fiber translucent or transparent paper. Make theimage area opaque. Light must pass through areas that are not to result inan image, while opaque areas are necessary to block the ultraviolet light foran image to appear. Use the same paper stock for all images in the series.This procedure eliminates changing exposure time in the diazo printer andminimizes film waste. Master artwork for the diazo process is a one-to-onereproduction ratio. For enlargements or reductions, use a copy camera. Youcan use the same master artwork repeatedly.Figure 2-23 shows a simplification of the diazo sandwich.Figure 2-23. —A simplified diazo sandwich.Continued on next page2-40
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