Gee people, In the past, I had many stains on my white tile workbench from "CS." When I started making "CS" without any SILVER NITRATE, guess what, NO STAINS!
For want of a better cheap test, go to a store that sells aquarium supplies, They will have a Nitrate Test Kit for about $6.00. Test your "CS", if you have Silver Nitrate, Find a way to make it without the nitrate! Dr. Bill
