Crease resistance and crease recovery are properties of fabrics. Crease resistance refers to a fabric's ability to resist forming creases during use, while crease recovery refers to a fabric's ability to return to its original shape after being creased. Various fibers have different levels of crease resistance, with wool having very good resistance and cellulosic fibers having poorer resistance. Crease recovery can be quantified by measuring the crease recovery angle and is impacted by resin treatments. The Shirley Crease Recovery Tester is used to objectively measure a fabric's crease recovery angle after intentional creasing.

1. Crease Resistance and
Crease Recovery

2. • Crease:
Crease is a fabric defect evidenced by a break
line or mark in a fabric generally caused by a
sharp fold. Crease appears when the fabric is
distorted in such a manner that part of it is
stretched beyond its elastic recovery. During
creasing the upper surface of the fabric goes
on extension and the lower surface goes on
compression.

3. Crease Resistance:
Crease is a fold in a fabric introduced on
intentionally at some stage of processing and
the resistance to creasing of textile material
during use is known as crease resistance. The
crease resistance of wool fiber is very good
but for the cellulose material is not good.
Amongst the textile materials the order of
diminishing crease resistance is Wool, silk,
acetate rayon, viscose rayon, cupro
ammonium rayon, cotton, flax etc.

4. Crease Recovery:
It is a property of textile material by which it
can return to its former shape after being
creased. The measure of crease resistance is
specified quantitatively in terms of crease
recovery angle. The crease recovery of a fabric
can be increased by resin treatment.

5. Difference between crease resistance
and crease recovery:
Crease resistance Crease recovery
Crease resistance is such
a property that resists
fabric from creasing.
Crease recovery is a
fabric property that
indicates the ability of
fabric to go back to its
original position after
creasing.

6. Crease resistance Crease recovery
Crease resistance is
generally measured by
bending elasticity.
Crease recovery is the
measure of crease
resistance specified
quantitatively in terms of
crease recovery angle.
Crease resistance comes
into play before the fabric
is creased.
Crease recovery comes
into play after the fabric
has been creased.

7. Crease resistance Crease recovery
Crease resistance resists
the stretching and
compression of the
molecular chain of fiber
polymer.
By crease recovery
property the stretched or
compression polymer
chain comes back to
normal position.

8. Shirley Crease Recovery Tester

9. Sample preparation
Ten test specimens are cut from a fabric with a template 2 inch
long 1 inch width.
The specimens should cut in such a way that no two warp way
specimens contain the same set of warp yarns and no two weft
yarns contain the same set of weft yarns.
For better result and avoid repeating of same set of warp and
weft yarn. All samples are cut at 450 angle both in warp and
weft direction.
The specimen should not be cut from creased, bent or other
deformed parts of the sample and also not from within 2
inches from the selvedges.
Conditioning
Since the moisture present in the fabric influence the
results the test are carried out after conditioning the
sample at 65% RH and 200C temperature for 24 hrs.

12. Procedure: