I have used a soap which irritated my skin. Lots of lukewarm water for rinsing is what works best. Soap is a surfactant. It is not necessary to use another soap to wash off the first soap. Also, even after the soap is rinsed off, the irritation remained and it took a little while for my skin to return to normal.
Also, our skin doesn’t absorb things very fast. Skin is a protective barrier and does a very efficient job of keeping things out. I don’t have time to discuss skin physiology so I recommend you research it.
I understand this topic isn’t about a “normal” bar. But you’re arbitrarily stating specific things are irritants when they’re not or at least not for all people. Based on what you’ve said, the logic behind your statement is - I used mango, it irritated my skin; therefore, mango butter is an irritant for people with sensitive skin and no one should use it. I googled earlier trying to find articles or something which stated mango butter was an irritant for people with sensitive skin. I couldn’t find anything. However, I’d be happy to read about it if you can post a link or links to articles which discuss it. BTW, I’m not going to discuss tea tree oil because I haven’t used it.
Anyway, you keep saying astringent like it’s a bad thing. It may not be good for some people but it’s not bad for other people. Also, I want to point out that something may be astringent but not drying or irritating. I include drying and irritating together since I’ve had products which so dried out my skin that my skin was irritated. However, dryness doesn’t always lead to irritation. Most of my problems when dryness leads to irritation is during extremely cold weather. Cold weather, furnace running all the time and dry air in the house - sucks the moisture right out of me.
I have sensitive skin and I’ve never had a problem with any of the “astringent” oils. Perhaps some people would if they have a sensitivity/allergy to an oil but it wouldn’t be from the astringent property.
Now if you want to talk about astringents/toners, then yes; some of those can be drying or irritating for people with sensitive skin. Toners are different from oils since very few have any ingredient in them for emolliency. They are created to constrict and tighten skin and pores so someone with dry skin might find the feeling uncomfortable. I haven’t used a toner in several years but I remember a couple in the past which did cause irritation for me.
I’m trying not to make generalizations. As I mentioned yesterday, there is always going to be someone who cannot tolerate an ingredient. An oil that is great for one person might be terrible for someone else. But overall, most people with sensitive, dry skin can handle products with astringent oils because of the triglycerides in them.
@ not_ally and JayJay -
While hunting for info on mango, I looked on Summer Bee Meadow’s oil property list. I think you’ll find the info on Babassu interesting.
http://summerbeemeadow.com/content/properties-soapmaking-oils
If I was using only water, then I would use Babassu 19% up to 25%. I could use slightly more 26% and a little higher if I was using buttermilk. I doubt I’d use 30% since it is more drying than coconut and I rarely use buttermilk as all of the liquid. I’m lazy and do the split method – enough water for the lye and the rest of the liquid is buttermilk. I should mention that I only use Babassu in facial soap recipes and I don't make large batches. That's why I'm willing to use a higher percentage.
Plus as Ann already mentioned, it is more expensive and I like her recommendation of 20%. I vary Babassu’s percentage because it depends on the time of year. During the summer, I can tolerate a higher percentage and I’ve found Babassu is awesome for the pores.
I want to apologize to JayJay for the topic hijack. I hope I didn’t upset you.
Again, it’s late and I need to log off. If what I’ve written isn’t clear, I’ll try to clarify my remarks tomorrow.