Whole-cloth bindings are turned in in the same way, but in this case the corners must be first cut off obliquely as shown in the illustration.
Fig. 60—Corners cut for turning in.
The cloth is cut off at the corners so close that only as much as the thickness of the board remains. Thick boards have therefore more cloth left at the corners than thin ones.
Fig. 61—Corners: Right and wrong.
The top and bottom edges must be turned in before the fore-edge. At the corners, the cloth is nipped a little with the folder, without, however, making an oblique fold; there should rather be a hollow round turn-over remaining which is only drawn on with the fore-edge, then from the corner slanting to the board.
The edges must always be turned in quite sharp; there must never be a hollow place on the edge of the board. On the other hand, it looks bad if the edges have been much rubbed down with the folder, at least with cloth; it is different with leather.
The turned-in cover is turned and the front side well rubbed down under paper with the folder. When cloth has once been glued it must not be allowed to lie long as it rolls up and sticks together, which renders it practically unworkable.
The finished covers are laid between pasteboards to dry; only when the drying has to be done in a hurry may they be hung on stretched cords. The latest in this work is a case machine which turns out 550 cases per hour.