Date: | 03 02 1934 |
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Description: | A man exposing a negative onto a zinc plate, in preparation for making a zinc etching at Wisconsin Engraving Co., 109 S. Carroll Street. |
Date: | 03 02 1934 |
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Description: | A man in the camera room at the Wisconsin Engraving Co. plant, 109 S. Carroll Street, is making a halftone negative, the first step in making a photo engra... |
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