two on and one off
A form of the HOLLOW , consisting
of the basic cloth lining applied directly to the
spine of the book followed by a strip of heavy
kraft paper three times the width of the rounded
spine glued to this lining, overlapping the spine
on one side only. The overlapping part is folded
back on itself even with the joint, slid off the
spine, and then folded over to make a tube. This
is replaced on the spine and the superfluous paper
is trimmed off. Depending on the way the hollow is
glued on, this method gives "two on and one off"
or "one on and two off." Variations of this
technique may be achieved by increasing the width
of the kraft paper to give "two on and two off,"
"two on and three off," etc. See also: SPINE LINING (1) .