Originally Posted by DeeAnna
I want to emphasize that adding a bit of KOH to a high oleic soap recipe does not change the essential nature of the soap. The soap and its lather still have a slick feel and the lather is more dense compared with a coconut oil soap or another freely lathering soap. What the KOH does do is reduce the amount of concentrated oleic gel that forms when the soap meets water -- the added KOH reduces or eliminates the slime/snot that makes an all-NaOH castile so unappealing to many. The lather builds quicker and easier, and you'll see more light, fluffy bubbles rather than mostly a low, dense lather. A 5% KOH high-oleic soap is definitely more pleasant to use at 4-6 weeks of cure than the same soap made with all NaOH.
Is this soap at its best after only 4-6 weeks compared to when it's multiple years old? I don't know. Maybe castile connoisseurs will take up the challenge. What I can say is using 5% KOH makes a high oleic soap a type of soap I might make more of, compared to the all NaOH version.
The bold above is mine, not DeeAnna's, but it is what I wish to address here.
First, I wish to thank DeeAnna for the Dual Lye tutorial and mention that I used it to create two batches of dual lye Castile soap this past June (2016). One was with pomace OO and one was with regular OO. Both were with [40% Lye Concentration]. So the water loss was greatly reduced right off the bat. I will be making this soap again with more water sometime in the future, but so far that's all I have to report on regarding a dual lye Castile as it compares to a single lye Castile.
You can read my in-depth comparison of the two different types of Castiles here
. My single lye Castile (NaOH) was 15 months old compared to the 6 months-young dual lye Castile when I tested them. I did try the young one when it was much younger, but I don't think I posted about that and did not find it any more un-ready than it is right now.
In short, NO, it is not at it's best at 4-6 weeks, because it is not at it's best at 6 months. Not in my current experience. My 15 month Castile (Single Lye and full water) has no snot-slime ropes, while my 6-month dual lye (95% NaOH/5% KOH at 40% Lye) Castile does.
Would it be different if I had made the dual lye Castile with full water? I don't know, as I did not do that.