... ,electroplate,ore dressing,precision casting,tanning,pharmaceutical industried,etc.2.Test Report 1.) ITEMPVD SALT/Rock salt 99.6%minHIGH PURITY SALT ... % must pass thru a 1mm standard test sieve99.8% must pass thru a 850um standard test sieveNo more than 80% pass thru ... more the 2.0% pass thru a 212um standard test sieveNo visible impurities3. SuperiorityThe content of Industrial salt/rock salt ...