David08848
Member

in Science

I found a formula I would like to use as comparison. It lists:

550 kgs. Potash Lye 50 degrees B

40 kgs. Soda Lye 45 degrees B

I did some research and have a basic idea about Specific Gravity, water percentage and lye percentage but really don't have a clue how to calculate this! Any assistance you can provide will be greatly appreciated!

David

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## Comments

I took the formula from the Thomssen 1937 book as written and put it through an Amount to Percentage Calculator.

Since the number for the oil phase total about 67% and the ratio between the two "oils" is what I need, I still need to figure out the actual amount of lye and water for the NaOH and KOH. Does this make it easier to calculate?

Yes, I am going to make shaving soap and the table is correct with 35 degrees Baume! (Don't get old!)

Yes, I could (and will) recalculate the SAP numbers for this formula and see what I come up with, but what I am looking for is what

they came up with,not only the numbers but the ratio of the two hydroxides together! (is it a 5/1 ratio or another ratio?) Also, how large is their water phase and what is their superfat percentage?So , it is:

1.98% (almost 2%) of NaOH at 35 degrees Baume

27.228% (almost 27.25%) of KOH at 50 degrees Baume

Sorry, I am clueless at this point but if you can assist me with the rest of the calculation, I can learn from it and others here will have this available if they need it! I really appreciate your assistance!!!!!

35 Baume = 28.83% solution = 11.53 lbs. lye and 28.47 lbs. H2O50 Baume = 49.40% solution = 271.70 lbs. lye and 278.30 lbs H2OThis formula changed from Baume solution percentages to lye amounts plus total H2O looks like this with the original listing turned into a formula based on 100% on the right:

300 lbs. Coconut Oil 14.85%

11.53 lbs. NaOH 2.32%

271.70 lbs. KOH 13.45%

80 lbs Glycerin 3.96%

1050 lbs. Stearic Acid 51.21%

306.77 H2O 14.96% ______________________________________________

2020 100%