What effect does salt have on ice cream?

If at all possible, avoid the rock salt from having any contact with the milk solution. The salt will have the same affect on the ice cream as it would if you dumped table salt into your chocolate milk! yuk! The salt should be added to the ice around the canister of milk solution, however. This produces the same affect as sprinkling salt on the roads during the winter. The salt lowers the freezing point of the ice making the whole thing colder and thus speeding up the ice cream making process.