One from the plant product Gum arabic and citric acid artificially produced preparation. By adding to the wine, the reaction of metals with ingredients of the wine and with it a precipitation of copper or iron and thus a metallic Taste prevented. This allows wine faults like white break and Black break be prevented. In addition, the precipitation of colorants is prevented and wines with a high tannin content are tempered. See also under beautiful in the section on blue finishes.