COMPOSITION AND PROPERTIES BONDERITE M-ED P ANODISING ADDITIVE is a highly crystalline tin (II) sulphate with minimum content of 55% tin, nearly free from tin (IV) sulphate and sulphuric acid. BONDERITE M-ED P ANODISING ADDITIVE does not contain complexing agents and stabilisers. FIELDS OF APPLICATION Due to its composition, BONDERITE M-ED P ANODISING ADDITIVE is specially suitable for use in the electrolytic colouring of processes of anodised aluminium. BONDERITE M-ED P ANODISING ADDITIVE colouring solutions are made up only once, concentrations, however, have to be regularly controlled by titration. In order to reduce tin-II-oxidation, ensure that the baths are not agitated with air. In case of recharging or reactivating an unused colouring bath, the necessary mixing should be done by using a re-circulating pump. For improving the throwing power as well as stability of the electrolyte, P3-Almecolor S should be added to the BONDERITE M-ED P ANODISING ADDITIVE solution. (Please refer to separate bulletin).