Description

AATCC Method 148-1989, Light Blocking Effect of Curtain Materials, was discontinued in 1994. During the time of its discontinuance, the need for a method to measure this property continued. The method has now been rewritten and retitled for reactivation, in parallel with an alternative method using a standard laboratory sphere spectrophotometer used in transmission mode (see AATCC Method 203). The two methods are not equivalent.

The test method measures the light blocking properties of textile and related materials using a photometer.

This method is applicable to all types of fabrics, including coated textiles and other textile-based constructions.