RA-4 paper seemed like the perfect candidate for colour pinhole photography. That's until I actually tried it....
It turns out that it’s overly sensitive to blue light. If left unfiltered, everything turns shades of blue, with no chance to get decent exposure in the other two colour layers:
Filtering with one layer of clear C-41 (print) film base seems to be meaningless in daylight as well:
Two and three are already an overkill:
Actually the only time I got reasonable colours was with incandescent light and a single filter layer:
WOW, was I amazed by the colours on that last one! But pinholes are a real joy in the open, and not in the house….