Homebrew PCBs

"pixelcanvas" <pixelcanvas@...> writes:
> I'm using an Epson printer with original DURABrite Ultra ink. The
> tranfarency film is some odd brand I found locally, looks like an
> ordinary acetate sheet with a smooth side and a coarse side for
> printing, I'll see if I can get a better quality one somewhere.

I'm using an Epson with Claria inks, but on specially treated films
designed for this use.  Look for Jetstar or Silkjet films (I got mine
from vpcinc.com), they have a coating on them that makes the ink dry
ultra fast.  From your photos, I'm guessing the inks "puddled" and
then dried, leading to those types of cracks.  If your films are
coated, you may be printing on the wrong side - use a marker in a
corner to test both sides and see if one is fast-drying.

Failing that, perhaps use an image editing program to only draw the
oulines of those big expanses of black.  It may avoid the cracking
problem, and save you some chemicals too.