Here is a recipe I use on my hair. Most of the time I don't have to use a conditioner, at least I didn't until I bleached my hair a few months back.
Even with it being bleached and damaged, this bar isn't as harsh as commercial shampoo.
They can get a little soft after a couple weeks if not able to dry really well between uses but it didn't become squishy.
Heated powder ingredients- add colorant here if using, micas work great.
SCI 32%
cetyl alcohol 5%
BTMS25 7%
Incroquat CR 5%
Shea butter (any butter will work) 5%
SLSa 28%
Liquid heated ingredients (mix with powders)
Disodium Cocoamphodiacetate 6%
Cocamidopropyl Betaine 6%
Cool down phase
Silk amino acids 1%
Panthenol 1%
Dimethicone 1%
Cyclomethicone 1%
CTAC 1%
Preservative 1%
Fragrance 1-3%
melt heated phase at 30 second bursts in microwave. Make sure not to burn or overheat, it will puff up and come out of your bowl if you do. Will resemble applesauce when melted.
Cool down to the appropriate temps for your preservative. Add preservative, additives and fragrance, mix well and quickly pour into molds.