Two plastic tubes are shown. One is banded in red, the other in green. A red Spectrum silk is placed in the red tube, a green one in the green. The performer brings the tubes to his lips, one at a time, and blows into the air. As the silks emerge, they have changed color. The red silk comes from the green tube and the green from the red! A self-contained mechanical effect. As a variation, the performer may make a mistake in loading the silks into the tubes, putting the red in the green and the green in the red. Then, by magic, the performer blows red from red and green from green!
This effect requires no skill. Avoid cheap imitation tubes made from cardboard by ordering through Silk King Studios.