Plate of an alloy of zinc, ground and polished on one surface and coated with an epoxide resin on the other surface ... and containing:
- 10 mg/kg or less of iron,
- 10 mg/kg or less of lead, - 700 mg/kg or more but not more than 900 mg/kg of aluminium and - 500 mg/kg or more but not more than 900 mg/kg of magnesium for the manufacture of sensited printed plates ...
