I thought that must be it.
I personally would make two separate lye waters, one for each concentration. I think it is easier and avoids confusion with adding water to one so that's how I will lay it out.
For your oils, you can either weigh out two separate batches, or weigh out one batch of 26 ounces (or 26.3 if you are being exact) and then weigh half of that or 13 (13.15) ounces into separate bowls. I prefer to measure out one batch of oils, then split it.
Do your oils whichever way and then set the bowls on the counter separated from each other, so you don't end up with confusion.
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I think, in the long run, it's much easier to do the lye waters separately. Your entire batch needs 104 grams of lye, but we are splitting it into two, so each part will use 52 grams of lye.
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So for the
high water part, the ratio of water to lye is 2.4:1. We need 125 gms of water and 52 grams of lye. I got this number because we need 2.4 times as much water as we have lye and 2.4 x 52 = 124.8, rounded up to 125.
125:52 is equal to 2.4:1. Some people like to work in the percentage of lye to water and this is 29%, for anyone following who wants to stick that number in a
soap calculator.
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For the
low water part, the ratio of water to lye is 1.4:1. We need 73 grams of water and 52 grams of lye. I got this number because we need 1.4 times as much water as we have lye and 1.4 x 52 = 72.8, rounded up to 73.
73:52 is equal to 1.4:1. For the percentage, this comes out to 41.6% so you can put 41% or 42% in a
lye calculator.
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Put one lye water by each bowl. You'll be able to tell which is which because there will be a bigger volume of lye water for the high one, but it never hurts to label things.
Make sure you are using a very well-behaving FO or EO. I always make the low water batch first because it can take more time to get it to light trace. Once I'm there, I do the high water batch because it's easier to SB to about the same place as the low water in a shorter amount of time. Make sure you account for splitting and coloring of course.
So high water combo will be 13 ounces of oils with 177 gms total of lye water.
Low water combo will be 13 ounces of oils with 125 gms total of lye water.
If I lost you somewhere, let me know and I'll try to clarify.