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 EXT THE IMAGE must be transferred to the prepared copper plate. The image-carrying tissue is adhered to the plate. This tissue/plate is then soaked in hot water softening the gelatin and allowing the paper base of the tissue to separate. |
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Portions of the gelatin that received little or no light during exposure to the transparency remain soluble and slowly wash away, leaving a gelatin image that will act as an acid resist when the plate is etched. The gelatin image on the copper plate, now called a resist, is then dried. |
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The exposed tissue and copper plate are
placed together in a chilled bath |
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The gelatin softens and swells.
The paper base separates and is removed. |
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