31 Top: (a) Repeated folding test for the historical leather C-1792; (b) Demonstration of the cardboard structure allowing movement to recreate the book manipulation. Bottom: (a) Conservation condition of a 16th-century book with red-rot; (b) Board reattachment and original lBeoatthh ei mr ba og ne sd:i n©g :Aonrai gOi nñaalt el eMa tuhñe or z(,1E) c, ko ol ez on aptai opnear l ceassut p( é3r) i, eauerreo -dceost taornt sf lvains ug ee lss (d3e) . L a C a m b r e .
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