“着色剂”的英语？

红色食物着色剂red food colouring着色剂组合物可以是液体或固体组合物.The colorant composition may be a liquid or a solid composition.粉末状的着色剂需要使用能够保持或转移电荷的纸张.Powdered colorant need to keep the paper, or transfer charge....