Homebrew PCBs

----- Original Message ----- 
From: "DJ Delorie" <dj@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, November 26, 2006 11:54 PM
Subject: [Homebrew_PCBs] mini-project done, and cleaning no-clean flux


>
> 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.

Rubbing alcohol is basically IPA, so it should be OK. Xylene works OK as 
well, but the fumes aren't very nice.

Leon