Upload
moumita-maity
View
234
Download
0
Embed Size (px)
Citation preview
7/30/2019 Fabric Properties & Colour Fastness Testing1
1/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
2/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
3/48
Fabric Properties
Colour Fastness Testing
7/30/2019 Fabric Properties & Colour Fastness Testing1
4/48
Colour fastness is meant as the
resistance of the colour of textilesto the different agents to which
these materials may be exposed
during manufacture and theirsubsequent use. The change in
colour and staining of undyed
adjacent fabrics are assessed as
fastness ratings.
7/30/2019 Fabric Properties & Colour Fastness Testing1
5/48
The conditions in the tests havebeen chosen to correspond
closely to treatments usuallyemployed in manufacture and to
conditions of ordinary use.
7/30/2019 Fabric Properties & Colour Fastness Testing1
6/48
An adjacent fabric is a small
piece of undyed cloth of a singlefibre or more usually a multifibre
strip made from yarns of variousgeneric kinds of fibres (acetate,
bleached cotton, polyamide,
polyester. acrylic and wool).
7/30/2019 Fabric Properties & Colour Fastness Testing1
7/48
The grey scales used for
assessing the change in colourof the test specimen and the
staining of adjacent fabrics
cover a range of 1 to 5 with halfgrades, 1
being severe staining/changeand 5 being no staining/change.
7/30/2019 Fabric Properties & Colour Fastness Testing1
8/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
9/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
10/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
11/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
12/48
AATCC test method for color fastness to
Crocking
Test specimen: colored printed cloth
specimen
size of the test: 5 x 13 cm. (2 x 5 in)Conditioning: Prior to testing, condition each
specimen for at least 4 hours in an
atmosphere of 21C and 65% RH
.
7/30/2019 Fabric Properties & Colour Fastness Testing1
13/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
14/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
15/48
Procedure :I) Dry crocking test
a) Place a test specimen on the base of the
crockmeter resting flat on the abrasive clothwith its long digression in the direction of
rubbing.
b) Place specimen holder over specimen asadded means to prevent slippage.
c) Mount a white test cloth square, the
weave parallel with the direction of rubbing
over the end of the finger which projectsdownward from the weighted sliding
arm. Use the special spiral wire clip to hold
the test square in place.
7/30/2019 Fabric Properties & Colour Fastness Testing1
16/48
d) Lower the covered finger onto the test
specimen. Beginning with the fingerpositioned at the front end, crank the meter
handle 10 complete turns at the rate of one
turn per second to slide the covered finger
back and forth 20 times. Set and run the
motorized tester for 10 complete turns.
Refer to individual specifications for any
other required number of turns.e) Remove the white test cloth square,
condition and evaluate.
http://www.fibre2fashion.com/product_launch/rossera_dec/aatc.htmhttp://www.fibre2fashion.com/product_launch/rossera_dec/aatc.htm7/30/2019 Fabric Properties & Colour Fastness Testing1
17/48
II) Wet crocking test
a) Establish technique for preparing wet crock
cloth square by weighing a conditioned square,
then thoroughly wet out white testing square in
distilled water. Prepare only one square at a
time.
b) Bring the wet pick up to 65+ 5% bysqueezing wet testing square between
blotting paper through a hand wringer or similar
convenient means.c) Avoid evaporative reduction of the moisture
content below the specified level before the
actual crock test is run.
http://www.fibre2fashion.com/product_launch/rossera_dec/aatc.htmhttp://www.fibre2fashion.com/product_launch/rossera_dec/aatc.htmhttp://www.fibre2fashion.com/product_launch/rossera_dec/aatc.htmhttp://www.fibre2fashion.com/product_launch/rossera_dec/aatc.htm7/30/2019 Fabric Properties & Colour Fastness Testing1
18/48
d) Continue crocking procedure as per Dry
crocking test.
e) Air dry the white test square, then
condition before evaluating. In the case of
napped, brushed or sanded material when
loose fibre might interfere with the rating,remove the extraneous fibrous material by
pressing lightly on the crock circle with the
sticky side of cellophane tape beforeevaluating.
7/30/2019 Fabric Properties & Colour Fastness Testing1
19/48
Assessment: Gray scale 1-5 forstaining.
1-poor, 5 - excellent
7/30/2019 Fabric Properties & Colour Fastness Testing1
20/48
Washing Fastness
This part of the standard specifies the
methods intended for determining the
resistance of the colour of textiles to
domestic or commercial launderingprocedure used for normal household
articles. A specimen of the textile in
contact with specified adjacent fabrics islaundered, rinsed and dried.
7/30/2019 Fabric Properties & Colour Fastness Testing1
21/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
22/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
23/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
24/48
Specimens are laundered under
appropriate conditions of
temperature, alkalinity, bleaching
and abrasive action such that the
result is obtained in a convenientlyshort time. The abrasive action is
accomplished by the use of a low
liquor ratio and an appropriatenumber of steel balls.
7/30/2019 Fabric Properties & Colour Fastness Testing1
25/48
A suitable mechanical device
consisting of a thermostaticallycontrolled water bath containing a
rotatable shaft which supports
stainless steel containers. Thechange in colour of the specimen
and the adjacent fabric is are
assessed by comparison with the
grey scales.
7/30/2019 Fabric Properties & Colour Fastness Testing1
26/48
Light Fastness Testing
All dyed or printed material experience change incolor when exposed to daylight for a sufficientlylong period because of the action of sunlight on
pigments or dyes used in them. The severity ofexposure in both time and intensity of daylightdetermines the extent of change in color.
The color fastness is denoted by the number of the
Light Fastness Standard Fabric that has changedcolor to the same extent as the test specimen. It isexpressed as the numerical Rating for Light
Fastness.
7/30/2019 Fabric Properties & Colour Fastness Testing1
27/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
28/48
(Light Fastness Tester) is designed to test
color fastness of textile materials to
sunlight. The main unit of the instrument is
completely made of M.S sheet with 500W
MBTL (Mercury Blinded Tungsten Lamp)
fixed at bottom to create artificial daylight
and topside open.Specially designed Sample holding device
is provided to expose the samples.
7/30/2019 Fabric Properties & Colour Fastness Testing1
29/48
Temperature of
the inside chamber is maintained
by water circulation. Sample
holding device has the provision
to inject the humidity solution tomaintain relative humidity of the
sample. Digitally control resettable
hour meter is provided in thecontrol panel to set exposure time.
7/30/2019 Fabric Properties & Colour Fastness Testing1
30/48
Heat Fastness Tester
7/30/2019 Fabric Properties & Colour Fastness Testing1
31/48
Perspirometer
The perspiration test unit is used todetermine color fastness to water andperspiration in textiles. Color fastness of
dyed or printed fabrics, againstperspiration, is determined by exposingthe fabric sample to the action of bothalkaline and acidic reagents, while in
contact with un-dyed adjacent fabrics onboth sides.
7/30/2019 Fabric Properties & Colour Fastness Testing1
32/48
Technical Details
Load on the Test Specimen :3.63 kg (8lb) AATCC & Adl. 0.47 kg (1lb) for ISO
Test
Size of Test Specimen :100 mm x 4 0mm
Size of Acrylic Separator Plates : 115
mm x 60 mm
Number of Separator Plates: Set of 21.
7/30/2019 Fabric Properties & Colour Fastness Testing1
33/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
34/48
Specimens of the textile in contact with adjacent
fabric are treated in two different solutions
containing histidene, drained and placed betweentwo plates under a specific pressure in a suitable
testing device. The specimens and the adjacent
fabric are dried separately. The change in colour
of each specimen and the staining of the adjacent
fabric are assessed with the grey scales. The two
solutions used in the test are buffered to pH 5.5 &
8.0. The test duration under pressure is 4 hoursat a temperature of 37 c, a suitable testing device
is a Perspirometer.
7/30/2019 Fabric Properties & Colour Fastness Testing1
35/48
Comfort
Fabric hand : Smoothness , fullness ,
stiffness
Permeability to air & water vapour
Initial cold feel
7/30/2019 Fabric Properties & Colour Fastness Testing1
36/48
Comfort :Air Permeability Tester
7/30/2019 Fabric Properties & Colour Fastness Testing1
37/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
38/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
39/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
40/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
41/48
Wet ability test
Sinking Time Test
Drop Penetration Test
Wicking Test
7/30/2019 Fabric Properties & Colour Fastness Testing1
42/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
43/48
Safety & Flammability Testing
7/30/2019 Fabric Properties & Colour Fastness Testing1
44/48
Flammable: A flammable fabric is one which
propagate flame, i.e. it continues to burn after the
igniting flame has been removed
Flame resistance rating : is the time in seconds
necessary for the propagation of flame 100 in in a
verticle strip .
Flame-proof: a flame-proof fabric is one which
does not propagate flame.
Flame-resistant : A flame resistant fabric is one
whose flame resistance rating is high i.e above
150
7/30/2019 Fabric Properties & Colour Fastness Testing1
45/48
Inherently flame proof material. Material
which , although not submitted to a flame-
proofing process , is flameproof.
Durably flame proof material: Flame proof
material which, after being submitted towashing treatment , remains flame proof.
Temporarily flame proof material :
Material which is flame proof before washing
treatment but not after the washing
treatment.
7/30/2019 Fabric Properties & Colour Fastness Testing1
46/48
7/30/2019 Fabric Properties & Colour Fastness Testing1
47/48
The 45 Test :- in which the time,t, for the flame to travel 5 inch
over fabric sloping at an angleof 45 degree is measured in
seconds.
7/30/2019 Fabric Properties & Colour Fastness Testing1
48/48