洗衣不掉色的妙法有色衣料会掉色,这和染料性质、印染技术有关。如一般染料大多容易在水里(尤其是在肥皂水、热水和碱水里)溶化。潮湿状态下染料也易受阳光作用褪色。染料和纤维纹路结合得不够坚固的,洗涤也易褪色。 Laundry does not fade the wonderful method of colored clothing will fade, which is related to the nature of the dye, printing and dyeing technology. Most dyes, for example, tend to melt in water (especially in soapy water, hot water and caustic soda). Dyes are also susceptible to sunlight in wet conditions. The combination of dye and fiber texture is not strong enough, washing is also easy to fade.