Explanatory notes
… to the exclusions mentioned in the introduction to this sub‑Chapter, this heading covers : (A) Metal sulphites ‑ salts … for the treatment of latex, in tanning, in oenology (as an antiseptic to preserve wine) and to reduce the buoyancy of … in photography, in breweries, for treating rosin, as an antiseptic or bleaching agent, in the manufacture of other …