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Soap Making Forum > The Soap Making & Craft Forum > Lye-Based Soap Forum > reheating lye
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Old 12-23-2009, 08:46 PM   #1
renaissancemom
 
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Default reheating lye

i just made a batch of lye and put it outside in the 32degree cold to cool down. 2 questions: 1. can lye freeze? and 2. I normally warm lye up with a warm bath but can i quickly put it in the microwave instead?


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Old 12-23-2009, 10:41 PM   #2
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I rewarm lye mix all the time in the microwave. I heat 32 oz of water/lye on high for about 2.5 minutes to get it to about 120 degrees.

And as far as freezing, I suppose it COULD freeze, but definitely not at 32. The lye acts sort of like anitfreeze, and lowers the freezing temp for the water.


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Old 12-23-2009, 11:08 PM   #3
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thank you very much, that is very helpful.
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Old 12-23-2009, 11:37 PM   #4
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Oh please be careful reheating lye in the microwave, that sounds like a recipe for disaster to me.
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Old 12-24-2009, 12:36 AM   #5
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Quote:
Originally Posted by ChrissyB
Oh please be careful reheating lye in the microwave, that sounds like a recipe for disaster to me.
I've reheated for 20sec intervals at 50% & had it crackle & pop. Sometimes it's fine,others not but it makes me real nervous.Giving up the practise....
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Old 12-24-2009, 12:56 AM   #6
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Well the lye mix I microwave is about 1/3 lye and 2/3 water .... in a big, thick-walled, glass "batter bowl" with the cover loosely laid on top. I have never had a problem with it.
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Old 12-24-2009, 03:01 PM   #7
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I've frozen lye water solid in my freezer - which is set at about zero F, if memory serves.

I really don't recommend microwaving it - ever - but if you are going to, be very very careful and while I"m glad no one has been hurt - please don't use any form of glass. seriously. read about pyrex shattering.

Don't even mix the sol'n in glass. Really. Please.

To warm your lye solution, set it in a pot or bowl of hot water.
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Old 12-24-2009, 03:44 PM   #8
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Carebear, I have never had a problem with my Pyrex-like batter bowl (another brand) and I have mixed AND reheated in it over 40 times. I don't know if folks who have them shatter have caused/allowed sudden temperature changes like immersing in a sink of ice water while the lye mix was near boiling or what.

If not glass, what do you mix your lye water in? I tried plastic before and it appeared to take on a color as though it had dissolved a little of the plastic into the mix. I am not sure what metal/s could be repeatedly used for this without suffering damage from the repeated strong caustic exposure. What does everyone use then?
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Old 12-24-2009, 04:56 PM   #9
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Then do it - your call.
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Old 12-24-2009, 05:28 PM   #10
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I mix my lye in a kool-aid type pitcher I got from the dollar store. You want to find one with a "5" inside the triangle and "PP" under that for a recycle code. They will take the heat.

Bruce


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