AATCC 79:2018 pdf download.Absorbency of Textiles
3. Terminology
3.1 absorbency. n.—the propensity of a material to take in and retain a liquid. usually water, in the pores and interstices of the material.
NOTE: Absorbency is sometimes refcrrcd to as wettability.
3.2 wetting. n.—the time required for a drop of water to lose its light reflection characteristic, i.e.. when it changes to a dull, wet spot due to the absorbent propensity of a textile material.
3.3 textile product. n.—an article of fabric, or other flexible material, made to protect or decorate the body (garments). for use in the home (bedding, drapery. towels, table linens), or other uses (i.e.. handkerchiefs, etc.).
4. Safety Precautions
NOTE: These safety precautions are for information purposes only. The precautions are ancillary to the testing procedures and are not intended to be all inclusive. It is the user’s responsibility to use safe and proper techniques in handling materials in this test method. Manufacturers MUST be consulted for specific details such as material safety data sheets and other manufacturer’s recommendations. All OSHA standards and rules must also be consulted and followed.
4.1 Good laboratory practices should be tbllowcd. Wear safety glasses in all laboratory areas.
5. Uses and Limitations
5.1 Absorbency is one of several factors that influence textile processing such as flibric preparation, dyeing, and the application of finishes. Oflen interchanged with the term wettability, the absorbency characteristics of a fabric can influence the uniformity and completeness of bleaching and dyeing by the ability to take in water into the fiber, yarn, or fabric construction. The suitability of a fabric for a particular use, for example gauze or toweling, may also be dependent upon a fabric’s ability and propensity to take in water.
5.2 Water absorbency may help judge or interpret “comfort.” However, users of TM79 should be cautioned that its test results should not be the only criterion for the assessment of comfort (see the 2OO AATCC/ASTM International's Moisture Management Technical Supplement: Ap-plicable to Apparel, Linens and Soft Goods, p19) (see 12.1).AATCC 79 pdf download.