colourant

例句：

1. 1. The artist uses a variety of colourants to create vibrant artworks.
   这位艺术家使用各种着色剂创作出色彩鲜艳的艺术作品。
2. 2. The scientist discovered a new type of colourant that could be used in dyeing processes.
   科学家发现了一种新型的着色剂，可用于染色过程。
3. 3. The food industry relies heavily on natural colourants to enhance the taste and appearance of their products.
   食品工业高度依赖天然着色剂来增强其产品的味道和外观。