I aimed for production of 80-100 ppm gelatin capped nano silver, followed the recipe for 320 ppm but for 1 litre distilled water (pH seemed a little high, 9,4 but reduction seemed OK). Kept current around 15-17 mA (measured between electrodes) with Voltage around 12-14V, lifting the electrodes (forgot about using just one silver electrode, have to see how that will influence the process
)
What I cannot get my head around is that the colloid does not pass through a "yellow" phase, as you can see in the first pic, after 10 minutes it was already tea colored. Why is that?
The second pic shows after 80 minutes (running a little above 15 mA and with water evaporating , my ppm seemed higher than the 80 ppm I aimed for (I added a little more glucose than required).
After diluting with 5 parts distilled water I reached a color I would consider 20 ppm (Third picture), so that would mean I produced around 120 ppm.