PURPOSE
To determine
the resistance of the colour of textiles to immersion in water according to ISO
105-E01.
EQUIPMENT
• Perspirometer
• Acrylic-resin
or glass plates
• Flat-bottomed
dishes
• Oven,
maintained at (37 ±2)°C
• Light box
with light source D65
• Grey scale
for assessing change in colour (ISO 105-A02)
• Grey scale
for assessing staining (ISO 105-A03)
• Distilled
water, grade 3
• Multifibre
adjacent fabric, type DW (ISO 105-F10)
TEST
SPECIMEN
One specimen
for each colour and material measuring 4 cm x 10 cm.
All products
and parts of a product including details such as labels, badges and drawstrings
need to be tested. Both solid and multi-coloured products need to be tested. If
the product is multi-coloured, make sure all colours are included in the
specimen to be tested. More specimens might be required if the specimen is
printed, striped or have multiple colours. Different parts in contrast colours
need to be tested, both against each other and against the multifibre. Cut
specimens of all colours and stitch them together face side to face side.
If face and
back side are different in colour or construction, both face and back side
needs to be tested. If sample is all over printed and backside is strong coloured
and visible at face side, no need to test back side against multifibre. (No
need to test light coloured backsides either.)
If details (including prints) are in contrast colour they
need to be tested both against multifibre and the fabric of which the detail is
attached. If not in contrast colour they need to be tested only against
multifibre.
METHOD
1.
Cut a specimens measuring 4cm x 10cm.
2.
Attach a specimen to multifibre of the same size, by sewing along one of the
shorter (4 cm) sides. The multifibre should be next to the face side.
3.
Switch on the oven and preheat pre-heat perspirometer & acrylic plates for
30 min.
4.
Place the specimens in a dish with 100 ml of the sweat solutions and thoroughly
with the help of glass rod/acrylic plate to wet specimen and multifibre for 30
min.
5.
Pour off the excess solutions from specimen by using wringer /glass.
6. Place each
specimen between two glass or acrylic plates and place them in the
perspirometer. Each perspirometer can hold maximum 10 samples. If less, all 11
plates still have to be placed in the perspirometer.
Put
a pressure of 12.5 kPa on the perspirometer using the load, lock it and then
remove the load. 12.5 kpa pressures must be evenly distributed on the sample
surface. Plates must be parallel to each other, inclination of plates due to
thick and thin (uneven sample surface) surface must be avoided.
7. Place the
perspirometer in the oven for 4 hours at (37±2)°C in upright position.
8. Take out the
specimens from the oven and perspirometer. Open out each specimen and dry them
in room temperature, not exceeding 60°C, with the specimen only being in
contact at the point of the stitching.
RESULTS
Assess cross staining,
change in colour and colour staining.
NOTE
When assessing
staining of different parts of contrast coloured products or product with
contrast coloured details, this should be considered as a cross staining.
