Back when I used to do film photography I used to create tons of cyanotypes. They were a fun way to process photographs, or objects onto paper to create a blue image. You would paint a light sensitive chemical onto an object that absorbs it well. You throw the negative up, or objects and let light/sunlight burn the image into the painted object to create this blue look. I took this in Death Valley and instantly made me think of my love of the days I did cyanotypes years ago.