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Creasing

Creasing is the formation of a crease, a sharp, elongated bend or fold that introduces a line of plastic deformation in a material. It can be intentional or incidental, temporary or permanent.

In textiles and clothing, creases are used to give shape and improve drape. Garments are pressed to

In paper and cardboard, creases are created by scoring or folding to guide future folds. This is

In origami and geometric contexts, a crease is a line along which a sheet is folded. The

In engineering and manufacturing, creases in metal sheets or composites can be intentional stiffeners produced by

set
creases,
or
fabrics
are
finished
with
crease-resistant
treatments.
Over-creasing
can
cause
permanent
set
or
fabric
damage,
while
some
fabrics
are
designed
to
hold
creases
for
a
tailored
look.
essential
in
packaging,
bookbinding,
and
greetings
cards,
where
pre-creased
lines
allow
precise,
repeatable
folds
and
easier
assembly.
pattern
of
creases,
called
a
crease
pattern,
determines
the
final
form;
folds
are
classified
as
valley
or
mountain,
depending
on
the
direction
of
the
bend.
bending,
or
unintended
defects
from
compressive
stress.
The
presence
and
angle
of
a
crease
affect
strength,
formability,
and
risk
of
failure,
making
crease
control
important
in
design
and
quality
assurance.