Using LithoProof with Positive Film
Do you know that you can use LithoProof™ to proof positive film?
Here is how that is done:
- For proofing positive film, you must have either a clearing filter on your exposing system or a sheet of W-2 mylar.
- Place proofing paper in vacuum frame.
- Place positive to be proofed on top of proofing paper, turn on vacuum and place W-2 mylar over the positive (if you don’t have a clearing filter).
- Expose with bright light to clear the background (exposure will vary with different light sources).
- Remove W-2 mylar (if necessary) and remove film positive.
- Expose LithoProof paper with UV light; no vacuum is necessary (again, exposure will vary with different light sources).
- This will give you a positive image on your LithoProof paper.