… of a kind used as luminophores, whether or not chemically defined. …
Explanatory notes
… of a kind used as luminophores, whether or not chemically defined (+). - Pigments and preparations based … Note to heading 25.30 ). (b) Separate chemically defined inorganic colouring matters (e.g., basic lead … rays, cathode rays, X-rays, etc.), produce a luminescent effect (fluorescent or phosphorescent). Most of these …