A recent job on a large folio printed in 1692 required a complete new binding:
The classic sprinkled panel design includes a repeated double-line fillet and a foliage roll.
Getting the corners neat and sharp is difficult, but there is an old trick for achieving a sharp square or mitred join at the corners:
Tape an old double-edge razor blade either at the end of the double line or across the corner of a mitre and the impression of the fillet or roll will end exactly at the edge of the blade.
Simple!
The Rebindery 