Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

"I'm not convinced those slots will be small enough to prevent the
vapor coming out when the bubbler is on."

Those slots can be sealed whith soft rubber material like surgical
gloves. I understand that you keep the etchant in tank when you don't
use it. Am I wright?

"Anyway, if you make that pendulum, why not attach soft plastic
brushes that brush the board? might be more uniform, and the wiping
action surely mixes the etchant well enough."

I'm totaly agree whith this opinion. All my actual boards is made
whith a bowl and a sponge brush. The quality of etched board is very
good.

"A spray etcher may not be that much more complicated in the end."
Yes if we solve the pump corosion problem.

"I'm not gonna try that any time soon, since my setup is just too
simple and too well working to change.

Tell me Stefan, you use a homemade tube or a comercialy one like those
make it for aquariums, or a long stone?

"duh if a stone is too uneven sitting there then move it"

Is perfect true. Moving the bubbler or the board orizontaly is much
better. But this don't solve the problem of differences between top
and bottom of the board.




Adrian