Terry Chamberlin said, > But silversmiths who > were exposed to metallic silver powder and either > inhaled it or continually got it on their skin > acquired argyria.
Marshall responded, The inhaling is easy to explain since the lungs oxidize metallic silver particles into silver oxide with h2o2. Getting it on the skin is harder to explain, and in fact I suspect that it may be an incorrect assumption, all was really absorbed by breathing it. ... we know silver dust becomes silver oxide in the lungs and goes into the blood as an ionic compound. What mechanism forms the absorption of silver on the skin? Is the dust basically working itself into the skin forming a tattoo directly? If so, this is irrelevant to taking it orally where it has to get into the blood stream first before it can reach the skin. On the topic of argyria from dermal application of silver, see: http://www.atsdr.cdc.gov/toxprofiles/tp146-c2.pdf Dermal. Medical case histories indicate that dermal exposure to silver or silver compounds for extended periods of time can lead to local skin discoloration similar in nature to the generalized pigmentation seen after repeated oral exposure. Other Systemic Effects. Decreased body weight gain was observed in guinea pigs following application of 81 mg silver nitrate (2 mL of a 0.239 M solution) to 3.1 cm2 of skin. At the end of 8 weeks, the silver nitrate-exposed guinea pigs weighed approximately 10-20% less than unexposed controls and controls exposed to distilled water (Wahlberg 1965). 2.3.2.3 Dermal Exposure Following the topical application of silver nitrate for the treatment of burns in two humans, silver was distributed to the muscles (0.03-2.3 ppm), liver (0.44 ppm), spleen (0.23 ppm), kidney (0.14 ppm), heart (0.032-0.04 ppm), and bones (0.025 ppm) (Bader 1966). No studies were located that quantitated the distribution of silver in animals following dermal exposure to silver or its compounds. However, Sano et al. (1982) detected silver in the same tissues of rats following topical application of silver sulphadiazine cream. 2.3.4.3 Dermal Exposure No studies were located concerning the excretion of silver by humans or animals following dermal exposure to elemental silver or silver compounds. *Once absorption through the skin and distribution to bodily tissues occurs*, it can be expected that elimination would be similar to that of silver absorbed via oral or inhalation exposure, that is, primarily via the feces, with minimal amounts excreted in the urine. This next was interesting, concerning silver's potential reactions to other minerals/chemicals. 2.6 INTERACTIONS WITH OTHER CHEMICALS As with other metals, relationships exist through which silver can influence the absorption, distribution, and excretion of one or more other metals. These influences are not known to increase the toxicity of other metals, nor are other metals known to add to any toxic effects of silver. Marshall said, When you increase the current density then the concentration near the anode increases, increasing aggregation, and if you don't stir, or if the water is hot you have the same effect. If chunks were breaking off then the size would be affected by the voltage, not the current, and all our tests have confirmed that it is current not voltage that effects particle size. Your reasoning comes from low-voltage brewed CS. When you use higher-voltage, as I do, the wires are too far apart for this to be a consideration. My wires are 5-1/2 apart. ALL of the DW is between the wires, so the concentration near the anode is the finished product (15-20 ppm). If the size was affected by the voltage, my CS would have very large particles, but in fact I have almost no Tyndall. I get away with my voltage because I have very low current. Whether its bigger particles breaking off the anode, or the silver particles aggregating to themselves is not important. I suspect you are correct about that being the mechanism. The type is relevant, as well as the size. Silver ions are extremely reactive, and silver particles are very non reactive, that is easily proven with the the salt or HCl test. Silver ions will plate out on silver particles when in the presence of a developer such as caffeine.. Ive been drinking about 20 oz/day of CS for the last 5+ years in the form of brewed coffee. No gray/blue anywhere that I can see. Even silver-nitrate, if it is crystal clear, would not be a problem I bet, because the tiny particle size would also limit the amount of it that could be ingested. Terry Chamberlin __________________________________________________________ Find your next car at http://autos.yahoo.ca -- The Silver List is a moderated forum for discussing Colloidal Silver. Instructions for unsubscribing are posted at: http://silverlist.org To post, address your message to: silver-list@eskimo.com Address Off-Topic messages to: silver-off-topic-l...@eskimo.com The Silver List and Off Topic List archives are currently down... List maintainer: Mike Devour <mdev...@eskimo.com>
