A treatise on wood engravings : historical and practical . roceeds from theeven surface of a metal cylinder covered with a blanket, there is nomeans of helping a cut, as is generally done when printed by a hand-press, by means of overlays. Overlaying consists in pasting pieces of * When there is any danger of the block spHtting from this cause, it is best to have actist taken from it, as by this means the whole is obtained of one solid piece. 614 THE TEACTICE OF WOOD ENGRAVING. paper cither on the front or at the back of the outer tyrapan, immedi-ately over such parts of the block as require t
A treatise on wood engravings : historical and practical . roceeds from theeven surface of a metal cylinder covered with a blanket, there is nomeans of helping a cut, as is generally done when printed by a hand-press, by means of overlays. Overlaying consists in pasting pieces of * When there is any danger of the block spHtting from this cause, it is best to have actist taken from it, as by this means the whole is obtained of one solid piece. 614 THE TEACTICE OF WOOD ENGRAVING. paper cither on the front or at the back of the outer tyrapan, immedi-ately over such parts of the block as require to be printed dark ; andthe effect of this is to increase the action of the platten on those parts,and to diminish it on such as are not overlaid. Wlien lowered blocksare printed at a common press, it is necessary that a blanket shouldbe used in the tympans, in order that the paper may be pressed intothe hollowed or lowered parts, and the lines thus brought iqj. Theapplication of the steam-press to printing lowered wood-cuts may be viiJJtSil&iiVc ;Vcl. .^ — .•iS?^^^?5^^gS,c--JJ;:^-V^--;. considered as an epoch in the history of wood engraving. Wood-cutswere first printed % a steam-press at- Messrs. Clowes and Sons esta-blishment,* and since that time loicering has been more generallypractised tlian at any former period. * The first work containing lowered cuts printed by a steam-])rcss Avas that on Cattle,pubhshed in numbers, under the superintendence of the Society for tlie Diffusion of UsefulKnowledge, 1S32. THE PEACTICE OF WOOD ENGEAVIKG. G15 By means of simply lowering the edges of a block, so that thesurface shall be convex instead of plane, the lines are made to diminishin strength as they recede from the centre until they become graduallyblended with the white paper on which the cut is printed. This is themost simple mode of lowering, and is noM frequently adopted in suchcuts as are termed vignettes,—that is, such as are not bounded bydefinite lines surrounding them
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectwoodengraving, bookye
