Yes, we did talk about this on a recent thread: https://www.soapmakingforum.com/threads/rice-water-soap.76216/#post-785324
But, no, soaping cooler would not help prevent the thickening. It would encourage it, I am sure of it. I keep my rice water in a jug in the refrigerator to drink and it thickens up pretty fast when it's cold. It will thicken up pretty fast at room temperature, too, so basically it's just the nature of the starches in the rice water. I am used to it because I have been drinking rice water (I make congee regularly) for many years.
I suspect there is a huge difference in how you obtain your rice water as to the amount of starch content however. Water simply used to rinse or even soak hard rice in then poured off before the rice is cooked in new water, would have far less starch and may not thicken much at all. I don't know, as I have never used that water. I only use water from cooked rice where I add lots of extra water to the rice. My goal is a drink that is high in rice starches, so that's how I make it. I strain the water through a sieve and the rice may be overcooked, but edible if desired and can be added to other food dishes to thicken or as a filler. The resulting rice water liquid that I reserve after straining is what I drink, but also can be used in other ways such as adding to soup for thickening, or even soap as part of the water replacement. But I have never added lye to it because I use a masterbatch 50% lye solution, to which I add additional liquid to create the desired lye concentration for any given soap recipe. But also because it's just too thick and cloudy anyway; I don't add dry lye to solutions that aren't clear enough for me to see if the lye is truly dissolving (been there; done that; moved on.)
Hi fellow soapers,
Need a little help here... I did a batch of soap using rice water to dissolve the lye...
While waiting for the temperature to drop, the lye mixture kind of gel up... Is that normal?
I am now thinking if the soap should be done the way like milk soap where you do at super low temperature. What do you people think?
But, no, soaping cooler would not help prevent the thickening. It would encourage it, I am sure of it. I keep my rice water in a jug in the refrigerator to drink and it thickens up pretty fast when it's cold. It will thicken up pretty fast at room temperature, too, so basically it's just the nature of the starches in the rice water. I am used to it because I have been drinking rice water (I make congee regularly) for many years.
I suspect there is a huge difference in how you obtain your rice water as to the amount of starch content however. Water simply used to rinse or even soak hard rice in then poured off before the rice is cooked in new water, would have far less starch and may not thicken much at all. I don't know, as I have never used that water. I only use water from cooked rice where I add lots of extra water to the rice. My goal is a drink that is high in rice starches, so that's how I make it. I strain the water through a sieve and the rice may be overcooked, but edible if desired and can be added to other food dishes to thicken or as a filler. The resulting rice water liquid that I reserve after straining is what I drink, but also can be used in other ways such as adding to soup for thickening, or even soap as part of the water replacement. But I have never added lye to it because I use a masterbatch 50% lye solution, to which I add additional liquid to create the desired lye concentration for any given soap recipe. But also because it's just too thick and cloudy anyway; I don't add dry lye to solutions that aren't clear enough for me to see if the lye is truly dissolving (been there; done that; moved on.)