Third, Roller for rolling in the gravure.
Fourth, Thick, fluid, strong amber-lacquer, as binding medium between the bronze and the color of the edge.
The following rules should be observed.
The treatment of the book block is similar to that of the hollow edge, therefore the book, after the fore edge has been cut and rounded must be scraped hollow.
As colors for the edge, the above mentioned colors, carmine, cinnabar, cobalt-blue and others are recommendable.
As binding medium a strong albumen or gum-arabic should be used. Aniline colors can be used for this purpose, but they must be dissolved in alcohol.
Such edges have a bewitching appearance if they are made in the same shade of color as the cover, but they render a certain practice in the mixture of colors necessary.
The coloring and burnishing of the edges is executed in the same manner as described in the article upon the production of colored edges. After the burnishing of the edge is executed, the time has arrived to imprint the ornament upon it.
Cut off of the thin leaf of roller composition, a strip slightly larger than the surface of the edge. Put a little of the thick, fluid amber-lacquer upon the roller, and move the roller forward and back on a smooth stone (marble slab) until the lacquer is equally spread out over the surface of the roller. When this is done, the gravure can be rolled over by aid of this roller.
The thin strip of roller composition is then carefully placed on the gravure, pressed on lightly and evenly with cotton wadding or a soft rag. By this means the ornament of the gravure is transferred to the roller composition.