The color fastness of textiles usually includes resistance to soaping, rubbing, light, bleaching or oxidation (reducing agent), ironing, perspiration and perspiration. Among them, soaping resistance, friction resistance, light resistance, water resistance and perspiration resistance are several color fastness indicators that most buyers pay more attention to in actual production and trade.
Color fastness ratings are: Level 1, Level 1-2, Level 2, Level 2-3, Level 3, Level 3-4, Level 4, Level 4-5, Level 5. 5th grade 9th grade. Level 1 is the worst, Level 3 is basic, and Level 5 is the highest, but almost impossible. Level 3 can only be a basic level, an intermediate level.