Page:The Art of Bookbinding, Zaehnsdorf, 1890.djvu/184

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144
BOOKBINDING.

quickly as possible in a circular direction. Renew the wool with varnish for the other side. Enough must be taken on the pad to varnish the whole side, or the delay caused by renewing the varnish on the cotton will cause a streaked surface. When the varnish is perfectly dry—a few minutes will suffice—the book must be again pressed. To do this, rub the gold-rag, which is greased, over the sides, this will prevent the sides from sticking to the polished plates. Place the book between the plates as before, leaving out the pressing tins, and place in the standing press. Only little pressure must now be given; if the press be screwed down too tightly the plates will stick to the. book. The varnish must be of good quality, and perfectly dry, or the result will be the same. Half an hour in the press will be found quite long enough. Should the plates stick, there is no other remedy than washing off the varnish with spirits of wine, and the glaire and size with warm water, and carefully re-preparing the surface as before. This is, however, an accident that cannot happen if due care and judgment be exercised.

Graining.—Graining is now used very much on calf books. It may be properly considered as a blind ornament. It is done by means of wooden, or, better still, copper plates cut out in various patterns, so as to form small squares, scales of fish, or an imitation of morocco. Place the volume between two of these plates, level to the groove of the back, in the standing press; screw down tightly. The pressure should be equal over the whole surface. Nothing looks worse than a bold impression in one place and a slight one in another, so that it is rather important that it be evenly pressed; a second application of the plates is impracticable. Graining has the advantage of hiding any finger-marks that may accidentally be on the calf, and also partly conceals any imperfections in the leather.