GB/T 730-2008 English PDF (GBT730-2008)

This Standard describes the quality control method for blue wool reference materials in batches in tests on colour fastness to light and weathering of textiles. This Standard specifies an instrumental method for assessing the dyeing uniformity of blue wool reference materials and two methods for assessing fading performance: visual evaluation and instrumental evaluation. The blue wool reference materials to be tested shall be compared with the reference blue wool reference materials. For relevant acceptance criteria and storage conditions, see Appendix A. This Standard applies to all dyed wool fabrics used as blue wool reference materials (1 ~ 7). Note 1: This Standard does not apply to blue wool reference materials 8, because the time required for fading from 8 to the gray scale 4 and 3 for assessing change in colour is too long, and alternative methods are being considered for its use. Note 2: The test method is based on GB/T 8427. This is because this method is recognized as the most widely used test method for color fastness to light and can represent all test methods that specify the use of blue wool reference materials. Note 3: For blue wool reference materials and names of dyes of various grades, see Appendix B.