“Caravaggio” flap folders are made
from Duralong Special conservation board.
They are produced in one piece with two
large flaps, two small flaps and four
inner tabs, two of them with a clam
self-locking design (see the picture detail).
They are designed to be completely closed
and then to protect the contents from dust.
They are equipped with a practical herringbone
cotton tying tape, not glued, to be
inserted through a slot.