Bindings and Folds - The Graphic Design: Reference and Specification - page 77

pa p e r g r a i n a n d f o l d i n g
Heavy text and cover stock
needs to be scored before
it's folded, preferably in
the direction of the grain.
Folding against the grain,
even with a score, may
result in problems. To deter-
mine the grain direction of
your sheet, fold it vertically
and then horizontally. When
it's folded with the grain, the
fold line will be much more
even than when it's folded
against the grain.

eight - page gatefold
A barrel fold with an additional fold in the
center, resulting in eight panels or pages.

eight - page french fold / sixteen - page signature
Multiple fold where the paper is first folded
in one direction, then folded perpendicular
to the first fold. This configuration is also
used when creating sixteen-page signatures.

eight - page parallel fold
A combination of a barrel fold and an
accordion fold that forms eight panels
or pages.