A great prop for an Invisible Deck routine
A deck of cards wrapped inside a handkerchief is introduced. The shape of the deck can be clearly seen through the folds of the fabric. The magician states the deck is invisible and is kept inside the handkerchief so as not to lose it. When the handkerchief is unfolded, right up until the last moment, the shape of the deck can be seen. With the last unfolding action, the deck seems to no longer be there. Nothing but an unfolded handkerchief. In fact the deck IS there but is invisible. The 'invisible' deck is picked up and handed to a spectator to reverse any card in the deck and the rest of a "Invisible Deck" routine is followed.
The special handkerchief does all the work. A great introduction to a classic effect!