Salt needs to pass the test.(workshop)

Any company that carries on the outside salt spray testing and performs the public American specification ASTM B117 should know the important changes to the quality of salt that they now must use.
The changes now in force for ASTM B117-03 are:-
* The salt can not contain any anti-caking agent also known as Potassium or Sodium Ferrocyanide or Potassium Hexacyanoferrate II or Chemically K4Fe(CN)6
* The amount of cent must not exceed 0.3 parts for million by weight--which is a maximum of 03mg cent per kilogram of salt or 000003 grm by Kg or 0.0003% by weight.
* The