They share a pigment used in hair dyes, which can lead to problems down the line.
他们使用染发剂的一种色素，它可以完全导致过敏症。
2
Acid and reactive dyes can be used for direct printing as well for flag production, cotton and other natural fabrics that need the advantages of dye over pigment.
酸性和活性染料可以用于喷印旗帜，棉布和其他天然织物要用颜料来喷印。
3
Its founders used nail polishes that were pigment-based instead of dyes, and they had polishes available in a variety of colors.