Gord, In starting to make litho positives for solarplates I used Dektol at 1 to 5 and got some good results, But the drawback is that you can only process 2 to 3 5x7 sheet per qt of developer. Also try to find a copy of J Seeley book High Contrast he talks about using Kodak fineline developer an 'still' develpoing the film. jan pietrzak