If it's standard panchromatic film, you MUST process in TOTAL darkness!(posted 9261 days ago)The easiest way is to do it is in a tray. Get at least a half-inch of developer in an 8x10 tray to the right temperature, turn out the light, pop 'em in, and set your timer. You can probably do up to about six sheets at a time in a setup like this. Gently, so as not to scratch the film, using your hands, keep the sheets moving. You can pull them from the bottom of the tray to the top, swirl them around a little, whatever.
I would suggest putting them in emulsion-side up, so they don't scratch when down on the bottom. The key thing is to not let them sit too long or get stuck together, but also not to agitate TOO much, because that leads to overdevelopment and increased grain. And be VERY careful with them - hold them only gingerly from the edges, and be as gentle as you can.
We used to develop lots of this size film in DK-50, in a deep tank meant for 4x5 and 8x10 sheet film. We used the hangers dentists used to use for developing their little X-ray films: made of steel, with a curved hook on top to hang over the side of the tank, and about ten o little clips on each side. We could do about six or eight sheets at once on one of these hangers.
Hope this helps...