chapter 78 Lead and articles thereof
Subheading Note.
1.- In this Chapter the expression “refined lead” means:
Metal containing by weight at least 99.9 % of lead, provided that the content by weight of any other element does not exceed the limit specified in the following table:
TABLE - Other elements
┌───────────────┬───────────────┐
│ Element │ Limiting content % by weight │
├───────────────┼───────────────┤
│ Ag Silver │ 0.02 │
│ As Arsenic │ 0.005 │
│ Bi Bismuth │ 0.05 │
│ Ca Calcium │ 0.002 │
│ Cd Cadmium │ 0.002 │
│ Cu Copper │ 0.08 │
│ Fe Iron │ 0.002 │
│ S Sulphur │ 0.002 │
│ Sb Antimony │ 0.005 │
│ Sn Tin │ 0.005 │
│ Zn Zinc │ 0.002 │
│ Other (for example Te), │ 0.001 │
│ each │ │
└───────────────┴───────────────┘