What kind of printer is used for post card production commercially?
Chances are a dye sublimation printer will be used. This kind of printer uses heat to transfer dye to a medium such as a plastic card, printer paper or poster paper (which is what most post cards are made from.) This kind of printer also applies a thin laminate which protects the print from discoloration from UV light and the air while also rendering the print water-resistant. That’s why most post cards appear glossy on the picture side and matte on the writing side. http://www.howstuffworks.com/question583… http://en.wikipedia.