Is this possible? What I'm trying to do is create a pinhole camera that is portable and can produce a full-sized photograph, hopefully instantly all out in the field without going to a lab. I've researched ilfachrome, cibachrome, positive-positive photo enlargement paper. Are there any options that would produce instant results? It needs to be something that requires an exposure of less than 5 minutes. If you have any ideas let me know! I would like to be able to gift these on the spot at a large event, which necessitates the need for having a finished photograph without a lab, but also if there are some good ideas that would necessitate a lab but afford me better quality/color I would definitely implement both. thank you very much!