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b:bring-up

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Bring-Up

To bring-up a form of types is to place overlays over those parts on which the pressure is deficient in order to increase it and to equalize it over the whole surface of the form.

With wood-cuts, in which an equal pressure over the whole surface is not wanted, it is to place underlays on the bottom of the block, under those parts which require to come stronger than the rest, these are the dark parts and the foreground, and to cut away the tympan sheet over the light parts and the distances when requisite, and to overlay those parts which require to be firm, with smooth thin paper. I have always found India paper the best, but the minute hard particles and all the extraneous substances, should be taken out by scraping it carefully with a knife, so as to render it quite smooth and even, otherwise the engraving will be injured.

In order to produce the finest impression possible, it is necessary that it should be the impression of the surface of the types and the engraving, and the surface only; therefore it is requisite to have very little blanket in the tympans, and that of the finest kerseymere or woollen cloth, or paper alone, so that it shall not be pressed in between the lines, which, when the pressman neglects this precaution, produces rough coarse lines; of course the overlays should be as few as possible and of very thin paper. See Fine Presswork, Making Ready, Overlay, Underlay.

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