sewing support stiffeners

Source reference: 

Pickwoad, Tacketed Bindings... (2000)

Nicholas Pickwoad (2000), “Tacketed Bindings: A Hundred Years of European Bookbinding”, in “For the Love of the Binding”: Studies in Bookbinding History Presented to Mirjam Foot, edited by Mirjam Foot and David Pearson, London; New Castle (DE), British Library; Oak KnollPress, 119–167.

Additional reference: 
p. 139

Used as preferred label for