Long ago I worked support at an advertising firm and we had a lot of color laser copiers with attached RIP engines for printing out not-quite proofs and whatnot

Long ago I worked support at an advertising firm and we had a lot of color laser copiers with attached RIP engines for printing out not-quite proofs and whatnot. (Sidenote: Terrible software to have to support. FieryRIP can eat a bag of dicks. In general the RIP engines, which ran Win 2k I think...just never seemed to work right, I think lots of print queue issues, and calibration was a PITA?) Out of the middle of nowhere we suddenly started getting jams on the machines. It was like an infection. Turns out that some genius decided they'd save the company money (which it didn't need to do, it was rolling in dough) by switching to a cheaper paper. The new stuff ended up in the machines around the building in a seemingly random order. Xerox sent a tech out. He inspected and cleaned some rollers, then concluded that our paper sucked. Proved it by printing ~500 pages on good paper he'd brought, and then using a ream of the old paper. If your laser printer is mis-feeding or jamming a lot, buy better paper. Also, humidity can be important. We had a "proof printer" room where the expensive color printers were that generated the actual "proofs" before stuff went off to get printed by the thousands-to-millions or shown to clients, and there was a household humidifier in the corner to keep things from getting too dry in the winter.