I bought in a couple of contexts, one of them is the chemical contacts, each color contains a different chemical makeup, but many of the colors contain more lead than is the legal maximum limit for children's toys.

我在不同的情况下买过，其中之一是化学用品，每种颜色都有不同的化学组成，但许多颜色的铅含量超过了儿童玩具的法定最高限量。