If one must use an accelerating agent, then adding a small amount of previously produced colloidal silver is recommended, over adding any type of salt. Traditionally, particle size has been determined by electron microscopy. This technique is quite slow and tedious, resulting in a procedure which is both slow and inaccurate. The absorption band of silver colloids increases in wavelength as the size of the particles increase. This allows a qualitative measurement of the particle sizes in a colloid by use of a scanning photospectrometer.
Ionic silver has an absorption band in the UV range and thus is virtually clear.
As more atoms aggregate into a particle, the absorption band moves from the UV into the violet, blue, green, yellow, orange and red. Since, the color of a substance is the complement of the color absorbed colloidal silver will go from clear to very light yellow, gold, orange, red, blue and green. Colloids that contain a broad range of sizes can absorb wavelengths across the spectrum resulting in brown and black. It is generally accepted that only clear to light gold silver colloids have particle sizes small enough to be effective, and to be able to reach the blood stream. The species specific understanding of, and difference between bacterial phase and fungal phase developments in blood pictures.