| 摘要 |
A supplemental flash exposure is made of a halftone negative in a process camera for making halftones. Before making the flash exposure, a reflector card is placed on the copyboard holding the original continuous tone copy, the reflector card having a gray scale value of between about 45% and about 80% of the shadow density of the original copy. The reflector card controls the flash exposure, so that dots formed during the main exposure in the highlight and middletone areas of the original copy are not affected, but dot formation in the shadow areas is enhanced. The result is a haze free reproduction with sharp definition and contrast.
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