AATCC 79 Absorbency of Textiles

Purpose of Test

This test evaluates the water absorbency of fabrics, yarns, and garments.

This test is used for textiles of any fiber content or construction, which include fabrics like:

  • Woven
  • Knit
  • Nonwoven

Terminology Defined

Water Absorbency – The measurement of how much water is absorbed by the textile when wetted with water.

Wetting – The time needed for the drop of water to lose its light reflection and change to a dull, wet spot due to the absorbency of a textile.

Test Method

Materials Used for Test

  • Test specimen
  • Water
  • Beaker
  • Burette
  • Embroidery Hoop
  • Stopwatch

Testing Procedure

A drop of water is dispensed into the tait surface of the test specimen. The wetting time when the water drop loses light reflection and turns into a dull wet area is recorded.

Test Procedure (Summary)

  • Part 1: Preparation of test specimen: The test specimen is placed in the embroidery hoop, ensuring there are no creases.
  • Part 2: Dropping of water: A burette dispenses a drop of water into the test specimen at a certain distance from the burette.
  • Part 3: Recording of time: The wetting is recorded with a stopwatch until the textile absorbs the water completely.

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