Homebrew PCBs

If your printout is not dark enough, you can try darkening with a black whiteboard marker. (more info in the group posts) I've used that trick with good results on printouts from my own printer.

I tried it on printouts from the local copy shop but it did not work at all. I think their toner may be different in some way than mine. It certainly feels quite different if I run my fingers over the printout. 

When using their copier I print 2 copies and double up. Works great (apart from the annoyance of doing the alignment) 6 Minute exposure time with standard UV LEDs, Then I leave it in the dark to cure for 10 minutes before developing.


--- In Homebrew_PCBs@yahoogroups.com, "Boman33" <boman33@...> wrote:
>
> Great progress!
> 
> Always leave a small piece of aluminum foil in the excess margin if possible
> to get a reference of guaranteed no exposure.   I used to have a step wedge
> with the foil permanent attached at one end  and then included the step
> wedge in the exposures.
> 
> Bertho
> 
>  
> 
> From: Hari Hendaryanto   Sent: Sunday, April 07, 2013 22:27
> 
> 
> 
> hey guys,
> i finally can get my clumsy old hand doing phoresist thing :)) ( from 
> laminate until etching). not perfect, but it's the best pcb i've ever 
> had, need a little touch up, but i think that's because the opacity of 
> negative film i used.
> 
> http://img33.imageshack.us/img33/7764/tebet2013040800294.jpg
> 
> thanks for all your times and helps guys
> 
> regards
> 
> hari
> 
> On 4/1/2013 6:45 PM, Hari Hendaryanto wrote:
> >
> > i'm sorry for late reply, i got my mails end up in spam filter, i've
> > just noticed and released it. sounds like another solution for me, and
> > thanks for that :), i was trying james sugestion and have an adequate
> > results. i'm getting better with this thing :). i'll take a look on the
> > video.
> >
> > anyway, i saw some dry film not rolled/curled back (stay flat). i was
> > using dry film that rolled back after cut. that was a problem too,
> > especially when separating thin plastic part from polymer (i used tape
> > on both corner side). but i think i just have to make more practice..
> >
> > thanks for all your supports guys :)
> >
> > regards
> > hari
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>