> I still think the answer is a micro wave. I've tried most of the sujestions
> and all have their pitfalls. The micro wave keeps even temp. and dose not
> add any moisture to the darkroom. Do recommend having a tester anc checking
> the oven on a regular basic!.
But here in reality, the room temperature is usually low enough so that
the solution, especially a small amount, cools in minutes. For a procedure
that takes longer than that you need a tray warmer.