I have made excellent b/w prints from color slides by enlarging the slides onto to Efke PL 25 then contact printing the negative: http://www.freestylephoto.biz/191281...ets?cat_id=404 The film needs to be handled and processed in complete darkness except for a few seconds with a dark green (Kodak #3) filter here and there. And at ISO 25 the exposures in your enlarger will be pretty short with a small aperture compared to printing onto conventional photo paper. With some experimentation you can get very nice results, though.