A comparison and discussion of foaming agents
What do we want in a foam?
Good long lasting structure?
I've been using Dawn and it worked fine in small batches. But Drexel FM 160 has been held up as the best.
Well that is a Foam Marking agent used by big ag to mark where they've spread something.
I found this on line comparison of what appears to be 4 leading foam marking agents:link text
I'm sure there are others out there.
I tried getting Drexel FM 160 by emailing Drexel and they recommended my local ag supplier, who DOESN'T carry it, but did carry the Precision Labs foam markers.