Homebrew PCBs

Ron,

Let me know if you need help with laminated panels. I have a dry film 
laminator and use a resist similar to the DuPont material. The resist 
I use is called ETERTEC HQ6015. It is 1.5 mils thick and processes 
the same as the DuPont 4015 we used in the past. Exposure time is 17 
seconds when using a Colight DMVL-930 exposure unit with 1.5 Kw lamps.
Development is in 1% sodium carbonate. Resist stripping uses a weak 
sodium hydroxide solution heated to about 120 degress F. This resist 
can be stripped at room temperature with longer process times.

I can supply single or double sided panels laminated with this resist 
and sealed in opaque black poly bags. Contact me off list with your 
requirements if you are interested in these materials.

Tom


--- In Homebrew_PCBs@yahoogroups.com, "Ron Amundson" 
<ron_amundson@h...> wrote:
> Since Kepro went out of business, I need to find a new supplier of
> presensized negative acting photoresist material . I tried some 
positive
> material from Injectorall, but can't seem to get a decent board 
from it. I'm
> sure it will work after I figure out the correct process, but that 
can get
> pretty expensive.
> 
> Ideally I'd like to find some place that provides the same type of 
material
> as Kepro had. It was a 1.3mil thick laminated negative acting 
photoresist,
> Riston EM312 Photopolymer film made by Dupont. It was developed 
with sodium
> carbonate.
> 
> Any ideas
> Ron