Textiles; Tests for colour fastness; Part X11 : Colour fastness to hot pressing

This technical specification establishes a comprehensive framework for evaluating the colorfastness of textile materials when subjected to heat and pressure. The methodology outlines specific test conditions, including precise temperature ranges, applied pressures, and exposure durations, to simulate real-world scenarios such as ironing or heat setting processes. It defines the standardized apparatus required for conducting the trials, ensuring consistent results across different laboratories and regions. The procedure details how to prepare test specimens, apply thermal stress, and assess the degree of color change or staining on adjacent fabrics using established grading scales. By providing clear instructions on sample mounting and measurement techniques, it enables manufacturers and quality control personnel to accurately determine how well dyes and pigments withstand thermal treatment. This approach supports the verification of product durability and helps ensure that finished goods maintain their aesthetic quality throughout their intended lifecycle under varied environmental conditions.