I had a recipe all ready to try out, with similar ingredients to Bioderma's Sensibio. It included distilled water, PEG-6 caprylic/capric glycerides (of course!), xylitol, cucumber peel extract, disodium EDTA, and a preservative. It was a simple one-phase mixing process, as there are no water and oil parts to emulsify.
As soon as I added the PEG-6 caprylic/capric glycerides to the water, it went kind of cloudy, which surprised me a bit, as the Bioderma formula is clear. I didn't worry about it, because the stuff I made with Cromollient SCE is also milky. I added in the rest of the ingredients. As expected, when I added the cucumber peel extract, the colour changed a bit. I'm using a powdered rather than a liquid extract and it makes things kind of yellow-y green. But it was fine and I mixered it all up.
I obviously can't leave well enough alone, so I tried it out right away. It felt okay, but not very much like the Sensibio. It was cleansing, but the dry-down wasn't the same; more residue-y, maybe from the cucumber extract or the gooey liquid Germall Plus I used to preserve it.
Anyway, within a few hours, I noticed something was settling out of solution onto the bottom of my beaker. I initially thought it was the Germall, since it looked pretty thick, but by the morning, the solution was clear with all the thick stuff sitting on the bottom, so now I figure it must be the PEG-6 caprylic/capric glycerides! What the heck! It's supposed to be a solubilizer, why is it coming out of solution?!
Clearly I need to have another go or two at this one. Sadly, it might not be for a while, since I have to help someone move this weekend and work out of town all next week. Boo. I guess I have time to contemplate what went wrong this time, since I still haven't figured that part out yet....
UPDATE Aug 28, 2016: So the strangest thing happened. I was more-or-less away for 10 days, so I just left this to sit. When I got home today, I mixed it up again with a frother-style mixer, and, lo! and behold, it is a clear solution! What the heck!? Did it just need some time, or did it just need some more serious mixing, or both? Anyway, I tried it again. It makes the same few tiny bubbles on the cotton pad as Sensibio (if you rub the two sides of the pad together), and it does not feel nearly as "residue-y" as I remember from before. Maybe the cucumber extract hadn't entirely dissolved before. Anyway, it is quite nice. Definitely an improvement on the last time I tried it. Perhaps a little more cleansing than Sensibio. Maybe they only use 0.75% surfactant in the commercial formula. Yay!
