Explanatory notes
… chemically treating natural gums . (3) Adhesives based on silicates , etc. (4) Preparations specially formulated for … pigments, etc.), contain other added substances not falling in that Chapter (e.g., waxes, rosin esters, … either directly or after treatment, for example, bird lime ( heading 13.02 ), silicates, not mixed ( heading 28.39 …