For posters, we use a beat-up old champ of a press – a Cameo 32. Ink-wise we generally stick to TW and Speedball, with the rare foray into latex.
Our favorite sheet is 80# Cougar White, followed by 100# KnightCoat Matte in cream. We also like us some kraft, but aren’t particular about weight.
We run posters at 18×24 or 20×26.
Shirts are run on a 6-color Hix, which is fun to say several times fast.
Offset printing is generally farmed out, but we’ve been in the business long enough that we can almost always get great deals.