tbrod:
I wish to explain something about the quote you posted.
The Vulnerability of Colloidal SilverA high Zeta potential and the associated mutual repelling action of the colloidal silver, ensures a long term relative stability. Unfortunately, colloidal silver is susceptible and vulnerable to any form of heat, either from thermal agitation caused by long wavelengths of light (green, yellow, orange and red), infrared and microwaves, as well as from the heat of a fire. The thermal agitation simply disrupts the colloidal clusters by vibrational forces, bringing them into contact and causing aggregation into ever larger clusters. At some point, the cluster reaches a critical mass and due to the effect of gravity, comes out of suspension. To prevent this from happening, colloidal silver should always be kept refrigerated
This article is from Journal of Physical Chemistry & Biophysics
The production technique they used did not include any stabilizer (cap). So yes, their silver is susceptible to heat and probably light. However if you use the production techniques given on this forum, the Colloidal Silver is far more stable, since its at least capped and stabilized with Karo (glucose and maltose), or one of the better agents.
Its very important when reading these journal articles that you are comparing apples to apples, and not apples to oranges.
Lucky for us that silver is hydrophobic, so almost anything else that we put into the water will collect around the silver particle displacing the water molecules, and thus capping it.