When making Colloidal Silver , atoms are stripped from the silver if low current is used ( 1 milliamp) If a high current is used such as 50 milliamps, then large chunks of silver are stripped from the silver anode, we call this Silver MUD, where the laser beam shines brilliantly in a lighted room.
The larger the silver bar, then the higher we can set the max current without stripping chunks of silver from the bar. Our on site genius Esstee found a very nice formula to calculate the max current for the surface area of the bar:
Even though I am using a 1 oz silver bar, I am still setting MAX current to only 2 milliamps to guarantee nano particles ( where I could use 15 milliamps to speed production). I love the results where the laser beam can barely be seen in a dark room for 20ppm silver, where 20ppm is confirmed by a calibrated Hanna PWM Meter compared to a known 20ppm solution of CS.