DMT-Nexus member
Posts: 3 Joined: 05-Dec-2015 Last visit: 16-Mar-2023
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Hi. After searching the site it seems like there is a general feeling that lime is too insoluble in water to be used outside of the dry teks. However, internet says repeatedly that limewater with a PH of 12.3 is relatively easy to make. Saturate a solution with lime, let settle, filter, maybe filter again, viola! Lime's solubility in water does decrease as the temperature increases but should be just fine at room temperature range to get that +12 PH.
I have made lots of limewater for hide tanning before and although the solution starts out very milky at first, all undissolved lime settles out after a day or so. Haven't checked the PH on the solutions, but if there was undissolved lime it indicates the solution is fully saturated and the PH would be around 12.3. I guess it could also indicate that the lime never dissolved at all, although after working with my hands in the stuff I can say that it was strongly basic.
Is there something I am missing about limewater? Another reason that it would not work/be ideal?
A search for "limewater" gives plenty of examples of how to make it.
As soon as I attempt some limewater and test PH I will report back.
Thanks everyone for making the Nexus such as special place!
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tryptamine photographer
Posts: 760 Joined: 01-Jul-2008 Last visit: 14-Jan-2025
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Yes, limewater is indeed strongly alkaline, but it can get depleted quickly because of the low concentration/solubility of calcium hydroxide - better not filter off the excess Ca(OH)2 for most purposes.
I did a little STB experiment years ago with a warm lime 'slurry' instead of lye, with powdered MHRB... yield was rather low but very high purity, snowwhite crystals in one go!
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DMT-Nexus member
Posts: 3 Joined: 05-Dec-2015 Last visit: 16-Mar-2023
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DMT-Nexus member
Posts: 1023 Joined: 19-Mar-2016 Last visit: 07-Apr-2024
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Also dont forget that limewater will loose its potency quickly because it absorbs CO2 from the air to form CaCO3 which isnt strongly alkaline anymore 
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Boundary condition
 
Posts: 8617 Joined: 30-Aug-2008 Last visit: 07-Nov-2024 Location: square root of minus one
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Lime is best stored as a paste. Even the powder absorbs CO 2. “There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work." ― Jacques Bergier, quoting Fulcanelli
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tryptamine photographer
Posts: 760 Joined: 01-Jul-2008 Last visit: 14-Jan-2025
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All true! Decades ago I bought a large 25 kg bag of wet lime paste (for real fresco paintings), stored it in a 'milieubox' container with a sheet of plastic on top to protect it... the sheet slowly degraded, CO2 got in and most of it is probably CaCO3 by now 
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