If you look at the photographic process you will find that the development bath has to basic for the silver ions to bind together and form the particles. In fact the stop bath is normally an acid since that will quickly stop the development.
Now it seems to me that there use to be lots of problems with CS being light sensitive in the past, but not much anymore. Maybe it has to do with people using bicarb to start with, thus making the CS alkaline. Table salt also seems to make it alkaline as well. This seems to make sense except you indicate that you only raised the pH to 7.0, which is neutral, so I am not sure quite what to make of it. Marshall "Robert L. Berger" wrote: > Hi Ya'all; > > On May 22 I made two gallons of HVAC ARC CO2 cs and it measured 14.5 > ppm. I proceeded to adjust the pH with bicarb to about 7.0. I left the > cs in the tank with a paper cover to keep out any dust. After several > weeks I noticed "trash" on the bottom, but did not examine it. > > Today June 21,2001, I examined it and found beautiful bright shinny > silver flakes on the bottom of the tank.. The concentration is now 5.28 > ppm. Since this is unusual I photographed it. Sure hope they turn out. > > The flakes are about 0.010 to 0.015 in size. When it is stirred up it > looks like one of the "snow flake" balls. > > So the question is, what is the possible adverse effect of using bicarb. > as a starter? > > "Ole Bob" > > -- > 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]>
