> How will you tell if the resist needs touching up?
>
hhhmmmm,, I dunno if I understand-- you mean how do I know if a
mistake has been made after the developer? it would be obvious I
assume once compared to the artwork. Things like creep, poorly filled
areas, etc.(in most cases could be manually cirrected with additional
re-touch work, but if not then...) A hypothetical problem that I
assume would render the pcb unusable for developing thereafter,,
correct? I mean to suggest that there are no re-dos for a
presensitized PCB unless you have some UV sensitive material to
spread back over the cleaned board? (I personally don't yet).
What else can I use to get the resist off the PCB after development?
I'm on a harsh budget so cannot go out and buy more chems than what I
curentluy have on hand.
Thanks in advance, Jd
--- In Homebrew_PCBs@yahoogroups.com, "Leon" <leon355@...> wrote:
>
> ----- Original Message -----
> From: "timbomcnuckle" <jaydag71@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Tuesday, August 14, 2007 7:06 PM
> Subject: [Homebrew_PCBs] UV developer re-do's....how to??
>
>
> > Hullo again all,, I am having a bit of a problem with figuring out
> > how ,if anyway, one is able to do a touch up when making a
transfer
> > based on the UV developer method-- I realize that it is likely
that
> > there is no help there due to the nature of the process itself,
but am
> > hoping the assumption is wrong?
>
> How will you tell if the resist needs touching up?
>
> >
> > I'm not in any trouble here, just curious-- I have way more
experience
> > with doing the plain-jane TT pcbs's but have most of the equip to
do
> > both methods (except for a good light source and the right
transparency
> > materials).
> >
> > Also, if there is no method to amend the mistake after making a
foul-
> > up, how easy is it to remove the resulting transfer and just use
the
> > ol' fashion TT method thereafter? what is the best solvent to use
for
> > removal?
>
> Sodium hydroxide solution (stronger than that used for development)
will
> remove the resist in a few minutes, or you could rub the board with
a paper
> towel and IPA.
>
> Leon
>