I figured I would bring you all some non-sanitizer related problems to diversify the forum posts.
I created a basic shampoo today with some stuff that I had laying around. Here is the formula:
Water - 63.0%
Cocamidopropyl Betaine (30%) - 23.4%
Sodium Alpha Olefin Sulphonate (39%) - 10.3%
Polyquaternium 7 - 1%
Sepimax Zen - 1%
Phenonip - 0.8%
Fragrance - 0.5%
Citric Acid - pH 5.5
Basically, all was going well until I added the preservative (a blend of multiple parabens) when suddenly, the product thickened to a near unusable point.
My question is: Was the thickening caused by the addition of the paraben blend? If so, what would you advise as a solution? Use less preservative (it is for personal use only)? Remove the Sepimax and rely on the parabens for thickening?