SHAMPOO BARS
Many soapers make and use lye-based shampoo bars and lye-based liquid shampoo. Myself included. It's important to rinse thoroughly after shampooing, with increasingly cool water until it's as cold as you can stand it to close the hair shaft. Follow up with a vinegar rinse to restore the acid mantle of the scalp. Beer is another option. I have a parsley/lemon rinse recipe in my files that's quite nice if interested.
When I first tried a shampoo bar in 2004 it took about a year for my hair to get used to it. I even went back to OTC shampoo a few times during that year. This is typical of other soapers' experience as well. Once my hair adjusted, I've used whatever bar that we happened to be test driving in the shower without any negative effects.
LIQUID SHAMPOO
I now make and use my own Flaxseed & Rosin (Liquid) Shampoo, Hog Wash Hair & Body (Liquid) Shampoo (50/50 PKO & Lard), & Dr. Bronner's Type Baby Mild (Liquid) Castile Soap and just love the results. I don't even need conditioner. But I do use a few drops of Argan Oil to add shine and nourish the hair.
Read more about Shampoo Bars on the Chagrin Valley Site. Links:
Why Use A Natural Shampoo Bar?
https://www.chagrinvalleysoapandsalve.com/blog/posts/why-use-a-natural-shampoo-bar/
Everything About Shampoo Bars
https://www.chagrinvalleysoapandsalve.com/blog/posts/everything-about-shampoo-bars/
On another note, you may want to try Polysorbate 80. Link:
Polysorbate 80 as shampoo
https://www.soapmakingforum.com/threads/shampoo-bars-again.64936/#post-664547
Yes. You can do just that but it will need shaking every time you use it. For 100 ml batch:
70% water
20% alcohol (preservative)
6% Polysorbate 20 or 80
1-3% fragrance (to preference)
1% glycerin (to stick)
A couple of other things that come to mind...
Add fragrance to argan oil (or oil of choice) at a rate of 1%. Work a drop or two into towel-dried hair and comb through.
ZANY'S BASIC HAIR CONDITIONER WITH LEMON (Use normal lotion making method)
Makes 200 grams = approx. 7 oz.
178 grams water (89%)
8 grams (2 tsp.) ReaLemon Lemon Juice Concentrate (4%)
6 grams coconut oil (3%)
(or oil of your choice)
8 grams BTMS (Conditioning Emulsifier) (4%)
1 gram (1/4 tsp.) Liquid Germall Plus (0.5%)
1/2 teaspoon fragrance
To use: Put a small dollop in your hand. Rub palms together. Work into ends first, then scalp. Comb through. Wrap hair in a towel for 5-10 minutes, then rinse with increasingly cool water until hair squeaks.
NOTES: This basic hair conditioner is quick and easy to make. Feel free to play around with whatever oils/butters/additives you like. Just remember to reduce the amount of water to keep the formula balanced at 100%. Coconut oil is very conditioning for most types of hair, but your hair might like something else.