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In the manufacture of metal type used in letterpress printing, a matrix (from the Latin meaning womb or a female breeding animal) is the mould used to cast a letter, known as a sort. Matrices for printing types were made of copper.
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matrix matrices used printing type metal letter copper century mould cast sort engraving nineteenth could casting typefaces types made electrotyping
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| emblems or medallions | instance of | or wide designs | 0.80 | text |
| were never very easily produced by punching since it was hard to drive large punches evenly | instance of | or wide designs | 0.80 | text |
| sand | instance of | or carefully casting type or matrices in moulds made of softer materials than copper | 0.80 | text |
| clay | instance of | or carefully casting type or matrices in moulds made of softer materials than copper | 0.80 | text |
| or punched lead | instance of | or carefully casting type or matrices in moulds made of softer materials than copper | 0.80 | text |
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