What wt(s) card stock can the HP 4200 print on with no problems?
HP has recomendation for paper. But of course you can print on card stock To have less problems, you should use thinner, more flexible card stock, but the printer will work with any card stock that it can pick up from Tray 1. While we can’t say you will have “no problems” with any type of media, if you can get through 4-5 sheets, you won’t have problems thereafter. A case could be made that thicker card stock will wear out a printer faster if you use it exclusively, we think that any difference is so small as to not be measurable (people who print a lot of card stock print a lot of everything), so go ahead and try it.