Adds Hardness to Bar?:
Creates Fluffy Lather?:
Creates Stable Lather?:
Adds Moisturizing Qualities?:
It's fatty acid balance is most similar to soybean and sunflower oil, and will contribute about the same qualities to soap that they do in terms of hardness, lather and conditioning.
All of these vitamins and antioxidants make pumpkin seed oil really wonderful in "leave on" bath & body products like balms, creams, lotions, serums and such. Do these qualities of the oil transfer through to soap? Probably not very much. Yes...some of the vitamin and antioxidant qualities of the oils transfer through into the soap - but just how much has really never been tested. Most folks I know save the super-premium nourishing oils like pumpkin seed for special skin care products, and focus on the more basic oils for soap making.
That said, in terms of pure marketing appeal, it's a wonderful luxury oil to add (a bit) to a batch of pumpkin soap.