Adding cyan filtration will remove red and will make the projected baseboard image look dimmer to your eye (which is sensitive to red) but the printing paper (which is not sensitive to red) won't respond with any difference.
Originally Posted by Ian Grant
If you are using graded paper, you can remove blue light by dialing in yellow filtration. A very rough guide is 30cc per 'stop' of exposure.
If I were in your situation, I'd get a ND filter and just screw it onto the threads of the enlarger lens.
Last edited by ic-racer; 04-30-2012 at 08:15 AM. Click to view previous post history.