We want a good flash foam (meaning immediate bubbles), rich lather (for a layer that stays), foam stabilization, and BUBBLES!
So from our surfactant list I would choose...
- Amphosol CG: Good foam, good foam stabilization, and increases mildness
- Bioterge AS-40: Good flash foam
- BSB: Adds thickness and bubbles
I would ideally have SCI and SLSa in there, but those are best left for bubble bars and other solid bubble baths as they can thicken TOO MUCH. (I know I seem obsessed with thickening, but if you can't get the bubble bath out of the bottle, it's too thick!)
We want some glycerin, because this maintains your bubbles for a long time, and Crothix to thicken. And we'll want a fragrance oil and preservative.
BUBBLE BATH RECIPE
30% Amphosol CG
22% Bioterge AS-40
up to 2% Crothix
0.5% to 1% preservative (Germall Plus or Germaben)
2% fragrance oil
Colouring, if desired
Mix your surfactants together until well blended, then add the water and blend well. Add the glycerin, preservative, fragrance oil, and colouring and blend well, but not too well as we don't want a ton of bubbles. Let it rest for a bit - say an hour or so - and check the viscosity. If you are happy with it, bottle and label it. If you aren't happy with it, then add 1% liquid Crothix and stir well. If you still aren't happy with it, add another 0.5% Crothix. You can go up to 2% Crothix, but ensure you stir very well in between additions.
You'll note we're using 2% fragrance oils instead of 1%. If you are using essential oils, do not increase to 2% unless you really know what you are doing! We use an increased amount of fragrance oil as a small amount of this mixture will go into a large bath, and bubble bath is all about the scent.
And we're colouring this mixture. Bubble bath is a feast for your senses, and a colour can go a long way to setting the stage for super happy fun bubble time. You can use fancy colourings like LabColours (which I love!) or by using food colouring.
Coming up - using essential and fragrance oils in your surfactant creations!