Hello fellow bubble heads! I've been meaning to post this for quite a while now and since there doesn't seem to be any shortage of requests for the recipe, here goes... For the record (no pun intended) this is the concentrate that I sent to Gary Pearlman, for use during his (successful) Guinness World Record attempt. It resulted in the creation of his monstrous "largest free floating" outdoor bubble, which measured nearly 3400 cu. ft!
4 cups Dawn Professional, Manual Pot and Pan Detergent
1 g. PEO (WSR 301)
2 teaspoons 91% isopropyl alcohol (chilled in the freezer)
1 oz. (Measured by volume, not weight) Surgilube
I started with the detergent in my mixing container, slurried the PEO with the alcohol and stirred that into it, then added the surgilube, making sure to mix it in well. That's all I added to the concentrate, however, I also measured out and shipped along with it 20 g. Baking soda and 6 g. Citric acid.
The mixing instructions I included were as follows...
Add baking soda to 4 gallons hot tap water and dissolve completely. Pour in concentrate and stir till fully blended. In a small cup, dissolve citric acid in 2 ounces of warm water, then add that to your solution and stir for a minute or two, to ensure it's well blended. Prepare the solution 4-6 hours before you intend to use it.
It should be noted that I'd personally spent time brewing solutions in Gary's home, so I was familiar with his tap water and knew that it was very similar to mine, in terms of pH readings. Depending on your tap water, you may need to adjust the amount of baking soda and citric acid you use, in order to achieve a reading of 7.4 on a digital pH meter.