Explanatory notes
… ), scalings, ash, slag, dross, scum or other metalliferous residues ( headings 26.18 to 26.20 ). ( c) Oxides , … 28.47 (hydrogen peroxide), or heading 28.53 (distilled and conductivity water and water of similar purity, including … colours, vitrifiable enamels and glazes and similar products of the kind used in the ceramic, enamelling or …