Contact printing frame question

[Jim Noel]

The old standby is Rubylith. Totally exposed and developed film often passes just enough light to fog the borders. Cardboard works, but does not give the really smooth edge of rubylith.

[Thomas Bertilsson]

Are you referring to mat board? Please educate the uneducated...
Basically, what it boils down to is: How do you make sure the contact between the emulsions is good?

- Thomas

Use black cardstock...works great when contact printing my 4x5 negs on 8x10.

[Thomas Bertilsson]

I wonder if one can take two pieces of rubylith, cut into an L-shape, and crop as you wish by overlapping them, while using a large contact printing frame.
That way I wouldn't have to make an individual cut in Rubylith every time I want to crop something.

How thick is it?

- Thomas

The old standby is Rubylith. Totally exposed and developed film often passes just enough light to fog the borders. Cardboard works, but does not give the really smooth edge of rubylith.

[KEK]

Thomas I ended up with black construction paper(the kind school kids use for projects) its very thin and i can get straight cuts using my matt cutter.