Are you talking about using a solid bar of soap to create a liquid soap? Like in some youtube videos & online blogs where that is done?
In some of those tutorials, I see glycerin & oil being added in equal amounts and then only 1 teaspoon or 1 Tablespoon each, depending on the maker &/or the total batch size, I suppose. But not all do it the same way, so I am guessing they came up with what worked for them via trial and error until they hit upon something that worked well for them. Or they learned from someone else who had already gone through that process.
So the interesting thing about glycerin is that it can help blend water and oils (emulsify). Although glycerin is rather sticky, so using a lot of it would tend to produce a sticky product.
Castor Oil alone is also rather sticky, so using both together could produce a stickiness, but as long as they are added in small amounts & well blended using a powerful blender, perhaps the emulsion would not be so sticky.
But I don't know. I've never added them to a re-liquefied bar soap. But in regular bar soap, too much of either absolutely does create a sticky bar of soap. That I have done, without that particular intent.
I also know that the African Black soap I have used was quite drying to the skin and some recommendations I read when I first used it was to use it only once or twice a week. So the glycerin and castor oil would offset some of that skin drying effect, and I suspect you are using Aloe Vera for the same reason, more or less.
You'll probably find that most soapers here at SMF are of the 'start from scratch' variety, in that we make our liquid soap in a more traditional way where we mix oils and potassium hydroxide lye solution to create our liquid soap, so you may not get many responses. The only time I liquified ABS was with only water, and no additional additives. It certainly melts easily in water. I gave a bar to my granddaughter, and it just melted away in the shower. She didn't really pay close attention to the caution of keeping it dry between uses.
