Thank Katie, she did all the work!
I'm not sure where the color comes from... I neglected to list <a
her own chemi/photograms, which were all done with B&W paper & chemistry, yet have a surprising range of color, as do Tarja Trygg's
"Solargraphs", which are 6-12 month pinhole exposures on B&W paper. I'd love to know why, too.
Also of interest are
these I-don't-know-what-you-call-thems that were made with a lensless Pentax 6x7 by f295 member Daryl.
What really strikes me when looking at this sort of thing is just how narrow our definitions of photography can sometimes be!