In a message dated 4/24/2005 8:51:45 P.M. Central Daylight Time,
hermod.pedersen@... writes:
I wonder if the amount of etch solution could influence the result
Of course, but the "absolute amount" is irrelevant. It only matters that
you have enough to etch the amount of copper involved! One rule of thumb I
have seen published is cover a board laying flat with 6 mm of etchant. That
assumes the container is about the same size/shape as the board. If a larger
container, you could cover with less, or even "shlosh" it carefully and
continuously until done. (Such shloshing is necessary anyway!)
"Professional etching" is done with the boards vertical. This means special
container shapes and board-holders, but a 18 mm wide container large enough
to hold the board involved is MORE than enough to etch one board at the time.
Now the total NUMBER of boards you etch with that same etchant in whichever
container is a function of the TYPE of etchant, the "ounce value" of the
board (copper-thickness), how much copper is removed for the particular pattern
involved, and the temperature of the liquid. This is a matter you will have
to learn via your own experience. Jan Rowland
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