I don't admit to knowing anything about chemistry OR cooking, lol, so I'm just experimenting as I go along. If you keep your batches small and keep them in the fridge, you really don't have to worry too much about preservatives anyway. But it would me nice to know I could take it along for a weekend trip or not worry if I forget to pop it back in the fridge.
Have you tried xanthan gum as a thickener? I find it a little difficult to work with, but it does the job.
2C-3A/ Coarse/ Normal to high porosity/ SW Florida
HG Products after lots of experimenting:
Cleanse: CJ Daily Fix, JC Cleansing Cream
Condish: CJ Smoothing, CJ Curl Rehab
Stylers: Okra gel, UFD CM, CJ PP, JC Spiralicious