"_Pictures on Calf._--We have heard of a process for transferring prints from the paper on which they had been printed to the sides of books bound in calf; and in these days, when _novelty_ is so much sought after, it might be worth some Friendly's while to test its efficacy. The side must be washed clean, and, while damp, the print is laid thereon, when, after remaining some time in the arming-press, it is said that a copy of the engraving will be found on the calf.
"In sending one of these executed in colours by him twenty years ago, a Friendly corrects an error we committed, by terming _prints_ PICTURES, and writes, 'In preparing the calf, it is simply washed with thin paste-water; when dry, a coat or two of weak salts of tartar. When perfectly dry, you may proceed with any subject; a very weak brown being generally used for its outline. For all colours, I use two cups of different strengths, with _quill_-pens and brushes to each. The green is composed of Scott's liquid blue and French berries. These are bruised and simmered from half a pint to a quartern, then caused to boil, and, while in that state, a pinch of burnt alum should be added to set the colour. The slate is weak copperas; red is obtained from Brazil dust and vinegar, or Brazil chips boiled, and solution of tin added. The books had generally double bands--the lettering-pieces stained chocolate, and the spaces between bands blacked, or the colours "_moused_," morocco being too bright for the stained calf. An octagon or square was coloured brown, slate, or sprinkled, and in the centre a light ground. Was the subject to my fancy, botanical works with a group of plants on the sides, when polished and pressed in japanned tins, had the neatest appearance. Landscapes, animals, insects, shells, &c. are all permanently fixed on the calf by the above-named colours.' He concludes by hoping 'the instructions are sufficiently plain to induce some aspiring F. F.'s to practise this almost forgotten branch of the art of finishing.'
Black lines in rays, or intersecting each other in the form of diamonds or other devices, on the sides of books, which present a good appearance if well executed, are ruled with steel or swan pens, the nibs being formed to the size required by the boldness of the lines. The vinegar-black mixed with a portion of gum-arabic, to neutralize a part of the action of the acid and make it of a stronger consistency, will be found to answer best. Whatever the pattern, it should be slightly traced with the folder, and the design be afterwards marked with the pen, kept steady by the aid of a ruler.