Is clear or dark colored colloidal silver ok?
Practical Colloid Chemistry, published in London in 1926. In the section on the “Colours of Colloidal Metals”, sub-section on the “Polychromism of silver solutions” on page 69, are the following statements: “The continuous change in colour from yellow to blue corresponds to a change in the absorption maximum of the shorter to longer wave-lengths with a decreasing degree of dispersion. This is a general phenomenon in colloid chemistry illustrating the relation between colour and degree of dispersion.” Colloidal Silver that has a high percentage of the silver content in the form of micron sized particles will absorb visible light causing the liquid to appear dark-amber or brown. It is the very high concentration of particles, not large particle size or contamination, that gives these products such color.
