
Copyright © 2022 American Association of Textile Chemists and Colorists
314 AATCC TM162-2011e2 AATCC Manual of International Test Methods and Procedures/2023
Developed in 1984 by Committee RA23.
Supersedes AATCC TM105-1975; edito-
rially revised 1985, 1995, 2008, 2010,
2012, 2019; editorially revised and re-
affirmed 1986, 1997; reaffirmed 1991,
2002, 2009; revised 2011. Related to
ISO 105-E03.
1. Purpose and Scope
1.1 This test method is used for evalu-
ating the resistance to chlorinated pool
water of dyed, printed or otherwise col-
ored textile yarns and fabrics of all kinds.
2. Principle
2.1 Yarn or fabric specimens are agi-
tated at a fixed rate in diluted chlorine so-
lution under specified conditions of tem-
perature, time, pH and hardness. The
dried specimens are evaluated for change
in color.
3. Terminology
3.1 colorfastness, n.—the resistance of
a material to change in any of its color
characteristics, to transfer of its colo-
rant(s) to adjacent materials or both, as a
result of the exposure of the material to
any environment that might be encoun-
tered during the processing, testing, stor-
age or use of the material.
3.2 pool water, n.—water to which
various chemicals are added to maintain
purity and clarity, normally used for
swimming.
4. Precautions
NOTE: These safety precautions are
for information purposes only. The pre-
cautions are ancillary to the testing proce-
dures and are not intended to be all inclu-
sive. It is the user’s responsibility to use
safe and proper techniques in handling
materials in this test method. Manufac-
turers MUST be consulted for specific
details such as material safety data sheets
and other manufacturer’s recommenda-
tions. All OSHA standards and rules
must also be consulted and followed.
4.1 Good laboratory practices should
be followed. Wear safety glasses in all
laboratory areas.
4.2 All chemicals should be handled
with care.
4.3 When using 6N sulfuric acid and
acetic acid, use chemical goggles or face
shield, impervious gloves and an imper-
vious apron. Concentrated acids should
be handled only in an adequately venti-
lated laboratory hood. CAUTION: Al-
ways add acid to water.
4.4 An eyewash/safety shower should
be located nearby and a high efficiency
particulate respirator with a full face-
piece should be readily available for
emergency use.
4.5 Manufacturer’s safety recommen-
dations should be followed when operat-
ing laboratory testing equipment.
4.6 Observe padder safety. Ensure ade-
quate guard at the nip point. Normal safe-
guards on pad should not be removed. A
foot-operated kickoff is recommended.
4.7 Exposure to chemicals used in this
procedure must be controlled at or below
levels set by governmental authorities
(e.g., Occupational Safety and Health
Administration’s [OSHA] permissible ex-
posure limits [PEL] as found in 29 CFR
1910.1000; see web site: www.osha.gov
for latest version). In addition, the Ameri-
can Conference of Governmental Indus-
trial Hygienists (ACGIH) Threshold
Limit Values (TLVs) comprised of time
weighted averages (TLV-TWA), short
term exposure limits (TLV-STEL) and
ceiling limits (TLV-C) are recommended
as a general guide for air contaminant ex-
posure which should be met (see 11.1).
5. Apparatus and Materials (see 11.2)
5.1 Equipment:
5.1.1 Option 1-Accelerated laundering
machine (see 7.1 and 11.3).
5.1.2 Stainless steel lever lock canis-
ters Type 2, 1200 mL, 90 × 200 mL (3.5
× 8.0 in.).
5.2 Option 2-Drycleaning Cylinder
(see 7.2 and 11.4).
5.3 Wringer.
5.4 Gray Scale for Color Change
(AATCC EP1) (see 11.6).
5.5 Test Control Fabric 162 (see 11.6).
5.6 Reagents:
5.6.1 Household sodium hypochlorite
solution (NaOCl), approximately 5%
available chlorine (see 11.5).
5.6.2 Calcium chloride, anhydrous
(CaCl2).
5.6.3 Magnesium chloride, hexahy-
drate (MgCl2 · 6H2O).
5.6.4 Sulfuric acid (H2SO4), 6N.
5.6.5 Potassium iodide, KI, 12%.
5.6.6 Starch solution, 1%.
5.6.7 Sodium thiosulfate (Na2S2O3),
0.01N, (see 11.7).
5.6.8 Distilled or deionized water.
5.6.9 Sodium carbonate (Na2CO3).
5.6.10 Acetic acid (CH3COOH).
6. Preparation of Reagents
6.1 Deionized or distilled water to
which 5 ppm chlorine and 100 ppm salts
(hardness concentrate) are added; ad-
justed to 21°C (70°F) and pH 7.0 with
sodium carbonate or acetic acid.
7. Test Specimens
7.1 Option 1-Accelerated Laundering
Machine.
7.1.1 Specimen size 5 × 5 cm; control
fabric size 5 × 5 cm. Total weight of spec-
imen and control fabric 1.0 ± 0.05 g.
Multiple specimens of the same sample
can be used to achieve a 1.0 g load.
7.2 Option 2-Drycleaning Cylinder
Equipment.
7.2.1 Colored specimens, approxi-
mately 6 × 6 cm. Total weight of test
specimens should be 5.0 ± 0.25 g. If
specimens to be tested do not weigh 5.0
g, add multiple specimens to make 5.0 g.
Include the Test Control Fabric in the 5.0
g weight. Different colored specimens
can be mixed when making up the 5.0 g
load.
8. Procedure
8.1 Solution Preparation.
8.1.1 Add 800 mL deionized or dis-
tilled water to a 1 L volumetric flask and
add 8.24 g calcium chloride and 5.07 g
magnesium chloride while stirring to dis-
solve. Bring volume up to 1 L with water.
This is a “hardness concentrate” which
can be retained and used for 30 days.
8.1.2 Dilute 51 mL hardness concen-
trate to 5100 mL with deionized or dis-
tilled water. Add 0.5 mL household so-
dium hypochlorite solution which is no
more than 60 days old. Determine actual
ppm Cl by titration and adjust to 5 ppm
(see 11.7).
8.1.3 0.01N Sodium thiosulfate can be
purchased in this form or can be diluted
10 to 1 volumetrically from 0.1N solution.
8.1.4 Adjust solution to pH 7.0 with
sodium carbonate or acetic acid as
necessary.
8.2 Option 1-Accelerated Laundering
Tester:
8.2.1 Place 1000 mL of solution (from
8.1) in the canister of the testing machine.
Adjust temperature to 21°C (70°F).
8.2.2 Place specimen and control fabric
in canister with solution. Specimen size 5
× 5 cm; control fabric size 5 × 5 cm. Total
weight of specimen and control fabric
1.0 ± 0.05 g. Multiple specimens from
the same sample can be used to achieve a
AATCC TM162-2011e2
Test Method for Colorfastness to Water: Chlorinated Pool
Copyright The American Association of Textile Chemists and Colorists
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