AATCC 26:2004 pdf download.Ageing of Sulfur-Dyed Textiles: Accelerated
2.1 Specimens are steam-aged in a moist atmosphere under controlled condi- tions and then tested for loss in strength to determine if storage deterioration is likely.
3. Terminology
3.1 accelerated ageing, n.—in textile processing and testing, use of controlled environmental conditions to promote rapid physical and/or chemical change in a textile material.
3.2 sulfur dye, n.—a dye, containing sulfur both as an integral part of the chro- mophore and in attached polysulfide chains, normally applied in the alkali- soluble reduced (leuco) form from a so- dium sulfide solution and subsequently oxidized to the insoluble form in the fiber.
4. Safety 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.
9.1 Precision. Precision for this test method has not been established. Until a precision statement is generated for this test method, use standard statistical tech- niques in making any comparisons of test results for either within-laboratory or between-laboratory averages.
9.2 Bias. The accelerated ageing of sulfur-dyed textiles can be defined only in terms of a test method. There is no independent method for determining the true value. As a means of estimating this property, the method has no known bias. 10.
Notes 10.1 The oven used may be of any conven- tional design and constructed of conventional material as long as the heating elements or materials of construction do not give off gases when heated which would tend to distort the results. The quantity of materials tested must bear a fixed relationship to the capacity of the oven, 25 g of materials tested per 0.03 m 3 (1 ft 3 ) of oven capacity being considered correct. 10.2 The temperature control must be accu- rate within ±2°C (±4°F). Care must be exer- cised to insure that the thermometer indicates the true and correct internal temperature of the area in which the samples are being tested.
10.2.1 The oven should be equipped with ports or vents of such size as to allow the air in the oven to be changed approximately every 2 min except when humidifying. This may be accomplished by natural convection or by a circulating system. During humidification the ports or vents should be closed to confine the moisture within the oven for the specified time.AATCC 26 pdf download.