Explanatory notes
… to 26.17 do not, however, include minerals which have been submitted to processes not normal to the metallurgical … for non-metallurgical purposes, and (B) Have not been submitted to processes not normal to the metallurgical … to which products of headings 26.01 to 26.17 may have been submitted include physical, physico-chemical or chemical …Legal note
… to 26.17 do not, however, include minerals which have been submitted to processes not normal to the metallurgical …