Ok thank you, one more clarified. No big deal.
This one is hopefully the last, as I hate to be a PITA.
What I remember is that we can make IS only up to 20 ppm, and if it's substantially over it will precipitate because the DW is saturated That appears to be contradicted here:
"For 20 to 40 ppm, add the gelatin after the electrolysis."
Does that mean that the precipitation between 20 and 40 ppm is not happening anymore without the capping agent? If that is so, then we can make 40 ppm IS and sugar reduce it to 40 ppm colloidal silver? Much better if true.
The solubility of silver oxide in DW is aprox 20 PPM at ROOM TEMP. The solubility limits are greatly affected by temp. At 68*F (20*C) it is listed as 13PPM @ Wiki. At 77*F (25*C) it is 25 PPM. And at 176*F (80*C) it is 53 PPM.
Extrapolating between those numbers, If you wanted to make 40 PPM then you could keep your temp above about 140*F (60*C) during the electrolysis and all the way til you get it reduced. Once it is reduced it is no longer silver oxide ions in DW so you don't have to worry abut the solubility any more. End of that problem.
BUT the long term stability of 40 PPM colloidal silver that is un-capped MAY not be very Long Term. At 40 PPM the particles are a lot more crowded in there than @ 20 PPM. That can overwhelm the forces holding the particles apart. So at lest some of the particles very well could wind up growing in size causing the color to darken. This may or may not happen depending on a few different things such as what you used to reduce it to colloidal silver, pH, etc.
Side Note: This long term stability issue is completely different than the solubility issue.
If you really wanted 40 PPM that would be for drinking then you could just gel-cap it after you get it reduced. That would stabilize it & prevent the particles from growing.
If you wanted to make highest possible PPM UN-capped colloidal silver (like for topical use) then you could keep the temp above 110*F (43*C) during electrolysis & until you got it reduced and brew it up to 30 PPM. That should hold up long term (again, depending on pH & what you used to reduce it.) You might even be able to push that Un-capped up to 35 PPM (with 120*F) if you used Karo as your reducer (but I'm not sure)?