"Robert L. Berger" wrote: > Hi John; > > There is no answer to that question !! > >> Does any one know the correct current to stop the process, enabling >> correct >> particle size? >
There probably is, but there are a lot of variables. The point is aggregation, and aggregation occurs more quickly at higer ppm, lower ph, lower voltage, higher temperature, and I believe stronger magnetic fields. The highest ppm occurs at the anode, so the higher the voltage gradient, the faster the the dispersion. So if you only vary voltage, the point where aggregation will occur drops with voltage. If you increase the current, then the ppm near the anode will increase with a constant voltage (the voltage disperses the silver via electrophrosis), thus aggregation will occur at lower ppm with higher current. Higher temperature will increase aggregation. Low ph causes the particles to be surrounded by H+ ions, thus lowering their mutual separation, and causing increased aggregation. IE. aggregation is increased by: lower voltage higher current lower ph higher temperature. I believe the reason that aggregation is a problem with impure water is that it increases the current, which increases the ppm near the anode, and of course if the ph is below 7, that too can cause problems. Marshall
