Roger wrote:
> Frank: How do you explain the milky appearance for very small particles, or > very large ones, for that matter, if, as Marshall says, light from the > visible part of the spectrum of not adsorbed in either case? Roger For very small particles, the absorbed light is way below UV and the complement is also way below UV, so no coloration is apparent. Since a high concentration of particles will absorb light to some extent across the entire visible spectrum without causing coloration, the solution then appears as a white milky solution. If anyone is really interested I will take a photo of such a solution and post it on my web site. I routinely make 5 to 10 ppm all particles in the 10-30 nm range. These all appear white and milky. frank key www.silver-colloids.com -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
