Edward Fairbrother Strange, Tools and materials illustrating the Japanese method of colour-printing
“ For the sake of economy, colour-blocks are sometimes cut on both sides; and, for small details, two portions of the design may be cut on one side, but only one colour is printed at each operation.In the actual cutting of the block, the old Japanese engraver adhered to an important principle—that of following the direction of the brush strokes of the original drawing, in such a manner as to reproduce the actual quality of the brush-mark. This is less apparent in the ordinary colour-prints ”
