I have just manufactured Printing On Demand. Those of you who know me have seen me perform this effect. It is an effect that I have been doing for the last couple of years. Every time I performed it magic friends have asked where they could get the cards. I could not answer in the past, but now you can get it on my web site. web page
You can see me perform the effect, but briefly:
A blank Bicycle card is placed aside. Four Jokers are shown to have blank backs. One by one the magician prints colorful backs on them. After all four backs are printed, the magician magically causes all of the Joker faces to vanish and all four of them appear together on the blank Bicycle card. "This is Printing On Demand."