1. The Lightfastness of the colorant of the toy storage bins directly affects its fading. When it is exposed to strong light, the lightfastness requirement of the colorant used is an important index. The lightfastness grade is poor, and it will fade quickly in use.

  2. The stability of heat-resistant pigment of toy storage bins refers to the degree of heat loss, discoloration and fading of pigment under processing temperature. Inorganic pigments are composed of metal oxides and salts, with good thermal stability and high heat resistance.

  3. The fading of the toy storage bins is related to the chemical property of the colorant. Chemical pigments and resins have strong reducing effect on some colorants, which seriously affect the heat resistance and weather resistance of colorants and cause fading.