Blue Colourant蓝色染料;蓝色素
polymeric colourant聚合色素
illegal colourant违禁食用色素
Colourant monomer聚合色素单体
food colourant食用色素
colourant-light stabilizer色料光稳定剂
colourant mixture computer配色计算机
iron and colourant天然水中铁的含量
Fragrance And Colourant Free香料和着色剂自由
N-COUNT（可数名词） A colourant is a substance that is used to give something a particular colour. 染色剂; 着色剂
...a new range of hair colourants.
...一种新染发剂系列。