Plastic plates generally have raised areas and are not used for offset printing and they crack. This is an offset plate. We know that because it isn't reversed. What occurs is the image is transferred to a blanket and then to the paper.
My experience with this printing is using aluminum. I'm not sure what process was used in 1962 however.
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Last edited by JTysver; 09-27-2018 at 02:00 PM.
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