Just curious what everyone likes to use in their pinholes.
I personally have an affinity for Arista APHS litho.
It's cheap, slow (helps prevent camera shake when opening shutter), and can get fine continuous tone in highly diluted Ilford/Kodak HC or LC-1 developer.
Best of all: it's cheap. 50 pieces 3.9x4.9 for $14 is good.
Also curious how many people use holders and how many just swap out each sheet in darkness.