What you are describing is fully hydrogenated soybean oil, which is pretty uncommon and has a melt point around 150. That would still be a triglyceride -- almost all tristearin and no trans-fats.Hydrogenated soybean oil should not give higher chances of DOS as it no longer contains linoleic acid. The fatty acids become stearic acid in true hydrogenated soybean oil. I'm sure that there are some residual linoleic and trans fatty acids but it would be negligible.
To make it harder, you are changing the recipe regardless of how you do it. Generally the best way is to revise the recipe to use harder oils (more saturated fatty acids). Greater amounts of stearic and palmitic acid in particular harden the soap. In CP it's easier to add those as part of oils instead of free fatty acids like stearic flakes that will accelerate or seize your batch. If you want to increase stearic and you have fully hydrogenated soybean oil, that is probably the ideal way. You can't use too much or it will want to congeal in a ring around the edges of your oils.I want to harden a recipe without affecting to much of the recipe I created. I know both Stearic Acid and Soybean Oil (full hydro) will do it. I don't know which one would be more appealing on the label. Any advice?
Yes, thats true but gsc specifically states "fully hydro" so I was thinking of that case.What you are describing is fully hydrogenated soybean oil, which is pretty uncommon and has a melt point around 150. That would still be a triglyceride -- almost all tristearin and no trans-fats.
Most (partially) hydrogenated soy is flaked vegetable shortening. Some of those shortenings are also used to make candles. It's almost impossible to get a reliable fatty acid profile for those. Most likely the linoleic is greatly reduced or eliminated as you suggest (at the cost of creating trans-oleic acid) and some amount of oleic is converted to stearic.
Is there a typographical error? Even if this was 15 grams in 8000 grams of oils (and it is less than that), it is considerably less than 0.2%, and would have no noticeable effect. The oil is equivalent to a tropical butter with higher than typical stearic acid, but cocoa butter is easily obtainable and does the job.If you can get your hands on allanblackia oil, 15 ml in an eight kilos of oils give a very hard and moisturizing soap.
This is just me, but I wouldn't use soy or stearic. You can harden formulas by playing around on SoapCalc, adjusting the % of each oil until the total reaches an INS Value of around 160 -- so-called "perfect soap".I want to harden a recipe without affecting to much of the recipe I created.