John, It isn't the ppm that is so important (although 5 - 10ppm has shown to be ideal in most cases), it is particle size. The smaller the better... and the stronger the solution.
Bob ----- Original Message ----- From: john freese To: silver-list@eskimo.com Sent: Wednesday, July 08, 2009 4:49 PM Subject: CS>PPM Hello If weaker CS is better than a stronger CS could somebody please tell us how a 5ppm is more effective than a 10ppm? Thank you. John.