Facet (printing technology)

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Bevel / facet

One facet in printing technology is the beveled ( chamfered ) edge of the printing plate .

Gravure

The facet is used to prevent the paper from tearing (being punched out) when an etching is printed , and it allows the pressure roller to run more easily.

The facet leaves an imprint on the damp paper, and an increase appears on the back of the printed paper - the printing paper is generally significantly larger than the plate. This embossing is regarded as a distinguishing feature for handcrafted gravure printing , for example in the case of etching or copper engraving , and is a quality feature of artistic printing because it proves its proper production (work trace). Autograph , print number (serial number of the print / serial volume) and dating are usually made directly to the left and right below the facet embossing. When the framework of the printing sheet facets embossing is not hidden, the zero surface of the printing paper has the same function as a mount for other graphics.

Letterpress process

The term facet is also used in the production of clichés . There, an approximately 5 mm wide, non-printing part of the plate edge is facetted at the tear line in such a way that only a 1 mm thick, slightly beveled edge remains to attach the cliché to the base. A facet milling machine is used for this. In the former apprenticeship of post-cutter , which belonged to the field of chemigraphy , facet milling was part of the job description.

source

  • Günter Schäfer: The artistic gravure: for beginners and advanced . Gunter Narr Verlag, 1987, ISBN 3-87808-871-X , glossary, p. 119 , col. 1 ( limited preview in Google Book search).
  • Wolfgang Autenrieth: New and old techniques of etching and fine printing processes - An alchemistic workshop book for erasers: From 'witch's meal and dragon's blood' to the photopolymer layer. Tips, tricks, instructions and recipes from five centuries. An alchemical workshop book for erasers. 232 pages, 7th edition, Krauchenwies 2020, ISBN 978-3-9821765-0-5 ( → excerpts and table of contents online )
  • Hans R. Kerner: Lexicon of reproduction technology. Reinhard Welz, 2007, ISBN 978-3-86656-536-4 , p. 215 ff.