What kind of recipe are you looking for. You really shouldn't use just grapeseed old. It has a short shelf life (6 mos or so) and would be prone to DOS. I personally wouldn't use it at more than 10%
I use the "no-no" oils like grape seed and sunflower oil in my soap recipes. I usually add vitamin E to the blend. I have a few old bars (over 2 years) and no DOS yet. In one recipe sunflower is 15 percent and I have one at 18 percent. The one with grape seed is 12 percent. I have one more recipe where the grape seed is at 20 percent - no DOS yet but the recipe is a newer one and my oldest bars are only 8 months old.
I add vitamin E directly to my oils when I buy them and there is an additional 1 percent added to the recipe.
How much? Like 1 drop/oz?
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