I guess it's not the highest quality but it does work. Yes there are some wrinkles on my sheets too (but only on the edges) and I am not using the full size anyway. I just try to cut it so any wrinkles etc end up in a big copper fill and I can touch it up any holes with a Dalo pen afterwards. It's quite easy to touch up wider tracks as well.
For me it was more of an experiment to see how well UV LEDs worked, and if I had a good way to make the artwork\mask, which is why I chose the cheapest.
As it turned out it's been pretty good so far, better than I expected so I'm happy with it, because I can make double-sided boards much easier now.
I can see though if you were expecting a perfect roll like something in their photo you would be less than impressed.
--- In Homebrew_PCBs@yahoogroups.com, "krisfr" <krisfr@...> wrote:
>
> That, the link you show here, is the company I had the poor results with. One of the plastic sheet, on both side of the resist, was wrinkled and for my application the sheets were too small. I used transperent media and doubled the images. I had four layers, two for each side of the board. The results were about 70 percent of what I was looking for, but I was not expecting perfection either. I have some coming from Europe. I will update this later. The cost for me is just too high for the small amount of product.
>
> Thanks for your input...
>
> --- In Homebrew_PCBs@yahoogroups.com, "tda7000" <Tda7000@> wrote:
> >
> > --- In Homebrew_PCBs@yahoogroups.com, "krisfr" <krisfr@> wrote:
> > >
> > > Anyone know of source of Cheap Photoresist Film?
> > >
> > > My last purchase on ebay was poor in quality and high priced...
> > >
> > > Thanks in advance...
> > >
> >
> >
> > I don't know about cheap but I bought the cheapest I could find at the time: http://www.ebay.com/itm/320735055777
> >
> > So far it's worked well for me. Haven't tried anything highly detailed though but I don't see why it wouldn't work.
> >
> > I develop it with washing soda, which is much cheaper than the stuff they want to sell to you.
> >
> > I use laser-printed artwork on a transparency sheet and expose with UV LEDs through a sheet of glass. Darken the toner with a whiteboard marker as suggested here.
> >
> >
> > Of course, they may have changed their stock since I bought from them.
> >
>