If I'm not mistaken 1.9 on a TDS would equal 3.8 uS on a PWT? If that is right it isn't nearly pure enough DW for me to make really good clear CS with. My experience as I just posted a bit ago, is that the more particles in the CS (color and TE) the more likely it is to go grey or stay cloudy after adding peroxide.........either that or it takes enough to make it severely nasty.

If you use that high peroxide content CS for mouthwash, though, it is excellent good stuff for that purpose, but I spit it out after the rinse and swishing.
sol

[email protected] wrote:

Don't have the answer, but I have been curious about my CS, that I made
in China a couple years ago, with the nearly same experience. I bought clear-plastic, bottled, distilled water, ;it tested approx.
1.9 with the TDS meter. It was yellow when done,(not much stirring) and
turned violet when I added a few drops of 35% fg h202.



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