I've read about some of the early pioneers of photography, who hauled heavy wooden boxes of equipment up and down mountains to bring back the first landscape images of those remote places.
They were - and had to be - very self-sufficient, spreading their plates with emulsion they made themselves to take the photos, dragging water up from nearby streams to develop their pictures, and so on.
Their chemistry must have been very basic, and yet it must have been reliable enough to make the endeavours worthwhile.
What is the simplest (and preferably, least dangerous) photosensitive material I could manufacture at home, to spread on a plate, and take a photo with a pinhole camera?
I presume much the same materials could be used to manufacture materials from which to make a print from the negative plate.