The German Footwear Institute (DSI) has produced a user-friendly guide to help tanners to avoid excessive doses of Chromium VI, and it is planning to issue a similar guide for shoe manufacturers toward the end of the year. It makes several recommendations to avoid its formation in the course of the leather supply chain. The book comes in five languages - German, English, Italian, Spanish and Chinese - and can be bought for €20, plus shipping costs. The research was supported by the German shoe and leather industry association, HDS/L, and an 8-year-old group of 60 shoe manufacturers and retailers, mostly from Germany, called CADS.