That’s an ancient Chinese secret. Oops, spilled one of the secrets to cleaning Chinese restaurants.
I'll have to ask our chemist what the technical name is, but it makes it just a little bit thicker than usual so that when it sprays on the duct work it stays just a little longer and kind of slides down.
We prefer to use the premixed (consistency and safety) even though it is a little bit more expensive.
Each 15 gallons (60 quarts) on average will clean about 40-60 restaurants which on average is about $8000 - $12,000 profit per container. So cost vs efficacy vs profit equals a premixed solution. We dilute 1 quart into a 2 gallon container and use that amount for the job.
We adjust the concentration by increasing or decreasing the amount of diluents that we add.
Disadvantage of the premixed is that the freezing point is around 50' F. So you have to take precautions to keep the temp inside of your trailer above that temp. We use portable ceramic disc heater with a thermostat to heat the inside of our well insulated trailers to keep it nice and toasty during the winter months.
Cost per 15 gallons + shipping is around $120. Which cost about $2.00 per quart. So your cost per job is around $2.00-$6.00 per job for chemicals.
Aw, Bryan, now you have "done made me" type too many words.
Rusty