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- Tympan means skin, and is used in a variety of technical meanings. In an astrolabe, a tympan is a metal plate on which the coordinates of the celestial...2 KB (232 words) - 01:59, 9 January 2022
when folded on to the tympans, and both turned down over the forme of types and run in under the platten, preserves the sheet from contact with any thing...55 KB (6,556 words) - 22:43, 4 May 2024
touching the target sheet, the frisket covers the area that is not desired to print. The frisket is set in a frame, often hinged to the tympan that holds the...5 KB (645 words) - 04:13, 18 July 2023
finished paper such as Bristol, placed upon the plate and covered with a tympan before slight pressure is applied. The collotype process uses much less...20 KB (1,803 words) - 18:48, 21 January 2024
hands and skin getting stained black with ink when removing sheets of paper from the tympan. In 1683, English printer Joseph Moxon wrote that "devil" was...12 KB (1,454 words) - 14:36, 16 May 2024
the late 1220s, vaults and walls were erected in bricks, partly hidden by sheets of sandstone. Only the outer wall of the southern row of chapels shows unhidden...34 KB (4,640 words) - 12:32, 30 April 2024
- size of the whole sheet, 3d, Time is saved by its being brought over from the side. 4th, There is nearly half an inch between the tympans and the platen
- the pressure on the plate or stone by the scraper bar. Lower the tympan - a thin sheet of tin held in a frame hinged to the middle of the machine, which