Testing & Quality Control
A low drape coefficient means a limp fabric that falls into many folds; a high one means stiffness.
— %
Higher values indicate a stiffer fabric
The Shirley test uses a 41.5 degree reference angle, which makes bending length exactly half the overhang. Take readings in both fabric directions and average them.
Fabric Drape Coefficient & Bending Rigidity Calculator — free, with the formula and a worked example, at Textile School.