I tin after etching, befor etching would be more difficult in the
toner transfer process unless you get a perfectly smooth surface.
The cost of toner is about zero with regard to toner transfer, I am
quit certain the toner for a circuit board is far less than 1 penny.
Don't know how it can use "Lot's" of toner, but then again, "Lot's" is
a relative term.
The etchant cost, I don't know yet how much per board that is.
However, so far it doesn't appear to be too expensive.
I use PCB Wizard, don't know about Eagle, others may answer that as it
is very popular.
Chris
> Do you tin plate before etching? Either way, it uses either lots of:
> plating, toner, or etchant. Unless you're using photo-resist, in
which case
> the extra light is more or less free, and exhausted developer is
still
> cheap.
>
> What software? Is it possible in Eagle?
>