In my humid area, resturants and diners put rice in their salt shakers to keep it smoooth flowing.
Salts are used in some bluing applications.
I'm wondering though that seeing Louisiana has salt mines, why is it so humid there?
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
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Former President of the ECPT (Eifel Combat Pistol Team)