Chapter 79: Zinc and articles thereof

Subheading Note 1. In this Chapter the following have the meanings hereby assigned to them: a. Zinc, not alloyed Metal containing by weight at least 97.5% of zinc. b. Zinc alloys Metallic substances in which zinc predominates by weight over each of the other elements, provided that the total content by weight of such other elements exceeds 2.5%. c. Zinc dust Dust obtained by condensation of zinc vapour, consisting of spherical particles which are finer than zinc powders. At least 80% by weight of the particles pass through a sieve with 63 micrometres (microns) mesh. It must contain at least 85% by weight of metallic zinc.