Briar, here is the info on Rag Co`s website:
Directions:
- Pour approx. 20 ml Snow Foam into 1 liter (1 quart) of water
- Lather the vehicle using a foam sprayer. If necessary, clean with washing mitts or similar and rinse with water.
- To hand wash: Pour 50 ml into 10 liters (2.5 gallons) of water, clean the vehicle with washing mitts and rinse with water.
- Perfectly suitable for application using a foam gun: Pour 10-30 ml Green Star into the pre-mixed Snow Foam solution.
I`ve kind of standardized around 1 oz soap in my Gilmour II foam gun (quart) and I generally do 1 oz in 2 gallons of water in the wash bucket regardless of what the product mfr claims or recommends. This has worked well for me and my water supply.