AATCC 112 Formaldehyde Release from Fabric (Quantitative) – Sealed Jar Method

Purpose of test 

This test uses fabric and water in a sealed jar to measure how much formaldehyde the specimen will release over time.

Terminology Defined

Colormetrics — Determining the nature and amount of a substance within water by the intensity of any color produced. 

A colorimeter used in the sealed jar method. (Image Source: grainger.com)

Test method

Materials Used for Test 

  • Fabric specimen 
  • Clear glass jar
  • Incubator
  • Water bath

Testing Procedure

  • This test is especially useful for fabrics that are finished with formaldehyde-containing chemicals. These include those made from blended cotton, rayon, and synthetic blended polymers.

Test Procedure (Summary)

  • Part 1: The fabric specimen is secured above the water solution in the jar, which is then sealed. The technician places it in an oven at a controlled temperature for a specified period of time.
  • Part 2: Using a colorimeter, the technician measures the amount of color change in the water. This represents the amount of formaldehyde released by the fabric specimen.   

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