To blind tool the side of a book it must be marked with a folder and straight-edge, according to the pattern to be produced; and as a guide for the rolls and fillets to be used. These lines form the ground plan for any design that has to be worked. Damp the whole of the side with a sponge, and brush it as before directed; then work the fillets along the lines marked. Run them over the same line 2 or 3 times. When dry, make the fillet immovable by driving a wooden wedge between the roll and fork, and gigger it backwards and forwards to produce the gloss. If tools are to be worked, make them slightly warm, and, as the leather dries, make the tool hotter and hotter. This must be repeated as often as necessary until the desired depth of colour and gloss is obtained. In using a roll that has a running or continuous pattern, a mark should be made upon the side with a file, at the exact point that first comes in contact with the leather, so that the same design may always come in the same place in the repeated workings. It is impossible for a roll to be cut so exactly that it may be worked from any point in the circumference without doubling it. Blind work is done in the same way whether in using a small tool or a large roll.
The leather must be damped and repeatedly worked until the depth of colour is obtained. It is then allowed to dry, and re-worked to produce the gloss. The beauty of blind work consists in making the whole of the finishing of one uniform colour, and in avoiding the fault of having any portion of the work of lighter tint than the rest.