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Engraving punch. A punch is a tool used to indent or create a hole through a hard surface. They usually consist of a hard metal rod with a narrow tip at one end and a broad flat "butt" at the other.
The Dogs of War, political cartoon by John Tenniel engraved by Joseph Swain, 17 June 1876, for Punch magazine, just at the outbreak of the Serbo-Turkish War. Joseph Swain (29 February 1820 in Oxford – 25 February 1909 in London) was an English wood-engraver. He is best known from his wood-engravings in Punch magazine of cartoons by Sir John ...
A "hollow-faced" punch has a raised contour (circular, or with some other shape) with a hollowed-out middle, and is used to stamp that contour, usually on the front face. A lightweight "chasing hammer", to drive the punches. An oxyacetylene torch, blowtorch, or a forge for annealing or hot-working.
While most ancient coin dies used engraving very heavily, early medieval coinage was dominated by dies created mostly from punches, which displace the metal of the die instead of removing it. There is evidence of medieval die cutters using engraving tools to lay out designs, and to create detailed punches.
The punch force required to punch a piece of sheet metal can be estimated from the following equation: [4] F = 0.7 t L ( U T S ) {\displaystyle F=0.7tL(UTS)} Where t is the sheet metal thickness, L is the total length sheared (perimeter of the shape), and UTS is the ultimate tensile strength of the material.
Other terms often used for printed engravings are copper engraving, copper-plate engraving or line engraving. Steel engraving is the same technique, on steel or steel-faced plates, and was mostly used for banknotes, illustrations for books, magazines and reproductive prints, letterheads and similar uses from about 1790 to the early 20th century, when the technique became less popular, except ...
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Again prints were nearly always on religious subjects. Usually the main lines of the figures and landscape were done in engraving. Then using metalwork punches, the rest of the image is composed of repeated use of the same pattern of punch in a particular area. These might be dots, circles, lozenges, stars, letters making text inscriptions, or ...
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