While a standard printer can get printing done on standard paper, it takes a special kind of printer to offer the ability to print on cardstock which includes greeting cards, envelopes, and so on.
Some projects require more than just printer paper. You might need to print an invitation, flyer or business card on cardstock. Cardstock goes by many names, such as pasteboard, poster board and cover ...
If the printer lists that capability it'll handle card stock without undue wear and tear on it's paper path. Most desktop units will go up to around 40-45lb via manual feed/mulitpurpose tray. To go ...