BEFOREHAND separate the red suits and the black into two packets. Reverse one packet, put the two together and shuffle the pack thoroughly. Show the faces of the cards proving they are well mixed, then separate the reversed packets with an apparent cut as already explained. Until you can do this deftly the separation had better be done behind your back. Show all the reds in one hand and the blacks in the other. Turn the outer end of the left-hand packet towards the right and put the right-hand packet on top, thus bringing all the narrow ends together, and the pack is ready for further feats.