They're no more toxic than B+W. The RA4 developer does have an odor to it. I like it but maybe that's just speaking to how much I've printed it. It's not so bad in 8x10 trays as it gets in 16x20 trays...

I wrote an article on this, with the only ammmendment that you shouldn't use fuji paper. Edge or Royal Generations or Ultra Endura or Supra Endura (stock up now) should work just fine.

http://www.apug.org/forums/forum221/...ing-200-a.html