I have made several batches of higher than 30 ppm CS, and can attest to how unpredictable and practically unrepeatable it gets. I have one batch that is so fainly colored as to be able to be called clear, has been stable for over 2 years, etc, etc. It finished up on the PWT around 60 something, and in storage stabilized at 39uS. But I've neer been able to duplicate that batch.

I keep thinking the moons of my nails, particularly the thumbnails are turning blue, but I don't remember what they looked like before I started making and drinking my CS in quantity, some 3 or more years ago. Since they don't seem to be changing, I guess it isn't the start of argyria......I do like to worry about it, when I have nothing better to worry about, LOL. Ya gotta keep your worrier excercised.
sol

Ode Coyote wrote:

Given using the same method and materials, somewhere around 20-25 PPM is generally repeatable. Going beyond 30 PPM and the odds of making a nice batch that stays that way get less and less the higher you go into the realms of "Good Luck"! Argyria...turning grey...can be accomplished with home made CS when using concentrations over around 50 PPM, taking a LOT of it over a fairly long period of time.



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