I'm in need of some neutral density when printing. I'm using Kentmere paper which is a fast paper to start with. I'm not printing large (8x10 and some 11x14). And even though I'm stopping my lens down to f/16, My exposure times are around 10 seconds. Too short for me to dodge and do other things.

I have a Beseler 45S color dichro head, and I heard once that you can use the cyan filter as a ND filter. Is this true? And, also, whether or not it is true, I know I can use ND filters, but will it affect image quality under the lens? How do I put one above the lens?

Thanks for any and all help!