A tympan is made from a soft material (such as parchment, leather, paper, rubber). It is used for letterpress printing and covers the the platen or printing cylinder while printing. It provides a necessary flexibility and can also be used to adjust the printing pressure. The tympan can be mounted permanently on the platen or printing cylinder or it mounted to a frame, which is then put between the platen and the forme while printing.
By Ralf Herrmann ()
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