Posted in the CureZone colloidal silver forum:
I took three slices of bread, and I lightly fine mist spritzed one on each side with water, one likewise with homemade ionic silver of about 8-10 ppm, and one likewise with Utopia Advanced Colloidal Silver
I then sealed each one into its own ziplock sandwich bag and let them sit for about two weeks.
At roughly two weeks the water and ionic bread slices had grown all sorts of fuzzies and green stuff, with the ionic slice being worse overall than the plain water slice. At this stage I tossed both of these out.
I'm currently about three weeks into the test, and the bread slice with the Utopia colloidal silver on it has yet to show any signs of growth. It still looks exactly like it did on day one.