Hi Ya'all; "Ole Bob" (Robert) is about to stir the pot once again. If you have a printer it just might be one that you should keep.
There has in the past been much interst expressed about the grade of DW for making CS. The fact that the High Voltage users require a very good grade of DW to make their equipment function properly, does not necessasrily mean that low voltage makers require such purity. Since by serendipity ( the art of finding that for which one is not looking) I stumbled into polalrity switching in the brew cell, and have come up with some very interesting conclusions. I will present the data on four, 4 hour runs using three different DW's and one demineralized water. Listed in order of there initial cell current during the first 2-5 seconds. (that is a far superior method than any tester one might have on hand as i represents what will happen in the brew cell.) Maker of DW Initial current in ma. Initial Rb* 24 hr Rb PPM Colorless Electrodes Sludge Wal-Mart .30 35 k ohms 57 k 10.6 yes mouse gray none (0) Hinkley&Sc. .38 30 k 54 k 11.0 yes mouse gray slight (1) Demineralized .79 24 k 41 k 16.5 yes dark gray more (2) Absopure 1.56 12 k 21 k 28.0 yes mouse gray more (4) Rb is my designation for the bulk resistance of a liquid measured in a one cubic centimeter conductivity probe. There appears to be direct relationship between Rb and PPM for a given CS set-up. Also there appears to be a relationship to the initial starting current to the final PPM. Whle the Tyndall was not listed there is a marked increase in the width of the lasor beam as one progresses down the chart. The Wal-Mart has a very narrow beam and the demineralized water had a very broad beam. This is something that should be explored as it may lead to a tentative evaluation of particle size. While I cannot include the data charts ( they are available) they show two general curve shapes. The two better DW's have a slow rise and then a roll-off with a slight flattening. The last two listed have a very fast rise for one hour and then essentually flatten out for the duration of the time. I reported that one user of switching sent me a sample that check out at 41.1 ppm. I have since learned that is was made with their own distilled water. It was a mixture of two runs both seede with about 12% with CS. One run was for 24 hours (possible 35 ppm) the second run was some what longer so its ppm must have been about 47 ppm. I don't know how to duplicate that with any other procedure. I would appreciate your analysis and comments. Robert -- 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] List maintainer: Mike Devour <[email protected]>
