Yunnan Rainbow Bio-tech. Co is the biggest transporting company of water soluble natural colors and one of the main transporting businesses of marigold and paprika oleoresins. They also offer Vegetable Juice Concentrates, 20-Hydroxyecdysone, Xanthophylls and Tannic Acid. They are constantly improving their technology and own several patents on special technologies, for example, Ultasonic Extraction and Molecular Distillation.
Tannic Acid Food Grade is obtained from Galla Chinensis by extraction, filtration, refining, and concentration. It appears as a yellow powder with a slight characteristic scent. This product is often used in clarifying beer and wine.
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