Explanatory notes
… treatment of oxides (of antimony, silver, arsenic, copper, chromium, cobalt, etc.) or salts (fluorides, phosphates, … 70.01 ), to “enamel” glass put up in the form of bars, rods or tubes ( heading 70.02 ) and to small regular … (microspheres) used for coating cinematograph screens, road signs, etc. ( heading 70.18 ). …