The book of trades; or, Familiar descriptions of the most useful trades, manufactures, and arts practised in England : and the manner in which the workmen perform their various employments.
(undated, inscribed 1829)
The engraver., pp. 44-45 ff.
44 THE ENGRAVER. ENGRAVING is one of the fine arts by which different subjects are repre- sented on copper, wood, stone, &c. 1 is performed either with the graver, the dry point, or with aqua-fortis. There are several species of engravings on copper, as engraving in aqua-tinta; in the chalk manner; in mezzotinto with aqua-lortis; and in lines, which is the original art of engraving. The tools necessary for engraving in lines are gravers, a scraper, burnisher, an oil-stone, a sand-bag, an oil-rubber, and some good charcoal. Etching is a method of engraving on copper in which the lines or strokes, in- stead of being cut with a tool or graver, are bit in with aqua-fortis or nitrous acid. Engraving on wood is a process exactly the reverse of engraving on copper. In the latter the strokes to be printed are sunk or cut into the copper, and a rolling press is used for printing it; but in engraving on wood, all the wood is cut away, except the lines to be printed which are left standing up like types, and are printed like letter- press. Box wood is used for this pur- pose.
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