Homebrew PCBs

Jan Kok <jan.kok.5y@...> writes:
> Frank Miller of Pulsonix says that it takes 45 seconds if the etchant
> is hot.

I've done it in 45 seconds.  To heat the etchant, I just half-fill a
small bucket with hot tap water and put the sealed etchant bottle in it,
15 minutes earlier in the process.  By the time I need it, it's just
right.