扎染古称“绞缬（xié）”，是中国古老的纺织品染色技艺，充满智慧的古人很早就开始使用植物染色。在自然界，有很多植物可以用作蓝色的染料，其中最有名的就是板蓝根，板蓝根的叶子经过发酵、氧化后，便形成了一种叫靛花的漂浮物，比蓝色的染液更鲜亮，正所谓“青出于 ...

Red 3, derived from petroleum, has been linked to cancer and behavioral problems, but is widely used by US food manufacturers ...

DIY natural plant hair dyes offer a healthier and more sustainable alternative to commercial hair dyes. Carrot juice, beet ...

While Tinctorium co-opts plant genes to make microbes make colour ... "For instance, polyester and cotton need different types of dyes and generally different types of machines to dye them.