Quote Originally Posted by Ian Grant View Post
The expression "taking the piss" comes to mind.

I'm not being rude, the expression comes from the old practice of taking the urine from the gents urinals in London by boat in wooden barrels to the North East coast of England, where it was hauled up a cliff face to a chemical works to extract the ammonia.

Urea breaks down to Ammonia, so that's one source of alkali


ammonia is also a rather weak silver halide solvent...so in principle it might do for a fixer...mind the gas- it is poisson...