PCB flux residue

[alanworland]

Interesting topic, we used to use rosin fluxes during the assembly of petrol pump circuit boards which used to get cleaned in a vapour laden tank, can't remember the product.
There was an 'incendary' incident with one of the boards (not good in a petrol pump!) and water based flux solders were introduced into our flowsolder machine which were washed off in an industrial type dishwasher.
Used to come out spotlessly clean - we used to measure the waste water.

Alan