As
DeeAnna mentions, it is true, I did make a single oil soap using only castor oil, back in 2015. I had to take a look at my notes on that particular soap and to report my findings re: soap made with only Castor Oil.
Okay, here's what I wrote over the course of making through using 100% Castor Oil soap (no other oil) at 0% SF:
Made Aug 14, 2015; set up quickly with only hand stirring; hardened within 48 hours; started out fairly translucent, turned somewhat opaque, but became more again as translucent as it cured; went from yellowish at the start to light beige to light tan; at 8 months, it was still partially translucent and a pale tan/beige-ish color. The bar remained hard in spite of producing a slimy lather. It never felt sticky to me when it was dry, however.
I still have it; it is still translucent; it is still hard; it is not at all sticky; it still produces no bubbles and not lather either, but at least the non-existent lather is not slimy anymore. But even now it is too harsh on my skin, too drying.
Maradapou,
The product you are trying to duplicate may be made by adding the ingredients to a liquid soap, which uses a different caustic than we use to make solid soap, so if there is a way to find out which caustic is used by the manufacturer in India, perhaps that would help you on the road to determining a probable formula. If you can't find out positively, then I would suggest using KOH and making a liquid soap to which you add the ingredients.
AND there is another castor that may be used in this as well as certain other liquid soap recipes and that is called
Turkey Red Oil or Sulfated Castor Oil, (or Sulphonated Castor Oil), which is a modified Castor Oil with a SAP value of approximately Zero (0) (
link), whereas regular Castor Oil has a SAP value of approximately 180 (KOH) / 128 (NaOH) (
link).
However, as I gather from some sources that the SAP value for Sulfated Castor Oil, really depends on how long the oil was subjected to sulfuric acid, which is apparently what alters the saponification number of the oil. Other sources suggest that Turkey Red Oil can be partially or fully saponified. It was all very exhausting looking through the material the first time I purchased Sulfonated Castor Oil & I don't really want to look through the material again.
So one would have to obtain the actual SAP value for the oil purchased directly from the vendor or manufacturer, in order to use it in any particular soapmaking formula. SAP value determines how much caustic (NaOH or KOH) one uses in the soapmaking formula; this is calculated via the soap making recipe calculator of your choice.
IMPORTANT: Please, make sure you carefully research the cautions for whatever ingredients you wish to add to a product, especially if you have others in your household, including pets. For example, Chloroxylenol is highly toxic to cats, fish and some amphibians, so allowing it into drainage water may be environmentally dangerous to the ecosystem. And if you have a curious cat like mine, you will need to take some seriously protective precautions to prevent your cat from coming into contact with this chemical.