Just finished a mini-project:
http://www.delorie.com/pcb/r8c-1b-adapter/This is a toner transfer board. I used the wiping trick for etching,
a little different than last time. I poured a bit of FeCl into a
small plastic tray, and dipped a sponge into it. I wiped the copper
with the soaked sponge, but this time I occasionally squeezed out the
used FeCl and soaked up more (same tray, so not "perfectly" clean, but
at least cleaner). The copper etched much faster this way (last time,
I poured the FeCl into the sponge, so there was no opportunity to
refresh it).
Question: I'm using Kester SP-44 flux, the no-clean type. I use NC so
I don't have to worry about what's under parts, but I'd still like to
"pretty up" the exposed board by removing the spent flux. Ideas?
What works on the flux, but doesn't damage the parts? I've got
xylene, a water pic, and rubbing alcohol available to me.
DJ