Explanatory notes
… are, for example Cr, Cu, Mg, Mn, Ni, Zn. (2) Copper is permitted in a proportion greater than 0.1 % but not more … reduction of the alumina dissolved in fused cryolite (the latter is sodium aluminium fluoride, but it acts solely as a … bars are used as anodes. The aluminium is deposited in the bottom of the baths from where it is syphoned. It is then …Legal note
… are, for example Cr, Cu, Mg, Mn, Ni, Zn. (2) Copper is permitted in a proportion greater than 0.1 % but not more …