Kevin Nolan wrote: > Marshall; I seem to recall you making these same remarks a while back. I > believe Ivan answered at that time that the response to light of > concentrated silver acetate in a photographic emulsion can hardly be equated > to what happens when a dilute solution is ingested in the human body.
Yes, but I don't consider 500-1000 ppm as dilute. > > Following some negative comments by Bob Berger on the light sensitivity of > CS brewed with citrate (actually, I think it was added potassium citrate, > which is a very different situation), I tried an experiment. Left an old > PETE jar containing ~ 20 PPM silver, brewed with excess citric acid, out in > the sun over the entire summer period. The solution is still perfectly > clear, with no signs of any dropout. But did you add the developer, and make the ph over 7? Without those two items, then "development" will not occur. If it is still acid, then it cannot occur, in fact stop bath is normally acetic acid for that reason. > I am not sure of the % ionic but there > is a moderate to strong TE present. By the same token, many list members > have reported light sensitivity of CS brewed with DW only - a sign their > technique was wrong, rather than any inherent photosensitivity with > 'traditionally brewed' CS. All photsensitivity does is cause a few of the silver atoms in a compound to reduce to silver atoms. This is of virtually no consequence, the real problem is that more can reduce upon contact with the atom (or CS particle), and make it grow until it becomes stuck. This does not require light, just the right chemistry, which blood is if you drink a cup of coffee. THE REDUCTION OF A FEW IONS TO SILVER ATOMS IS OF NO CONSEQUENCE. IT IS 'DEVELOPMENT' THAT IS A PROBLEM. > As far as silver citrate being 'another compound > of silver' - so is predominantly ALL the CS made, whether HVAC or LVDC. The > figures quoted are anywhere from 75-99 % ionic silver. Well it can't just be > silver ions present - what you have is the COMPOUND silver hydroxide > (dissociated in solution as ions of course, just as silver acetate is). So > the arguement is whether acetate ions are somehow more dangerous than > hydroxy ions. My own experience suggests it is quite safe when taken at the > same kind of levels as 'ordinary' CS. I believe you are asking the wrong question. Silver hydroxide is not a problem because the silver immediately binds with the chlorine in the stomach acid, producing silver chloride, which for all practical purposes precipitates out. The small amount that can stay in solution is so low as to not be of concern. The correct question is, what happens when silver citrate is mixed with the hydrochloric acid in the stomach. Will it give up the citrate in favor of chlorine? If so then it would likely not be a problem for the same reason, if it stays in the form of a soluble citrate, then it could be a problem. I believe it would extremely easy to test, if you add a little HCL (muratic acid) to a solution of silver citrate, does silver chloride precipitate out? Marshall -- 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]>
