I am not sure if this is the correct forum but I think I can get my question answered here. I recently got the above book and the images in it are wonderful. Burchfield indicated that he puts plants on out of date B&W paper in the sun and creates what appears to me to be photograms. The images all have somewhat brown tones but he does not indicate that the prints are ever chemically fixed. Does anyone have an idea how he makes prints having the colors in the book? I could not find an address where I could reach Burchfield to ask him my questions directly.