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t:tympan-cloth

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Tympan Cloth

A fine and even linen cloth, about an inch or two larger on every side than the paper worked on: this cloth is wetted, and the water wrung out again, so that it remains only moist: it is laid on the tympan instead of a tympan sheet, the under sides of the corners pasted to the tympan, and worked upon as a tympan sheet for the reiteration. It is used to save paper, and it is repeatedly washed to clear it of the ink that sets off on it. — M. It is not used now, but set-off sheets are substituted for it.

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