Browser's Den of Magic

Carbon Cards 2.0 by Jeff Hinchliffe

The magician introduces four cards which are blank on both sides, explaining that these cards are like carbon paper but for playing cards. Removing one for later, the magician adds a normal card to the remaining three. Instantly they become duplicates of the card!

Removing the card and introducing a different card, the cards immediately transform into duplicates of the new card! Finally, removing the second card and re-introducing the blank card set aside at the beginning, all the carbon cards return to being blank, on both sides.

Comes with two sets of gimmicks, each set transforming into two cards. All that's required is an Elsmley count and a double lift.