Show mystifying CHEMICAL TRICK plain blue handkerchief turns white when warmed few drops of iodine Is sufficient A plain blue handkerchief Is shown to the audience when the handkerchief Is warmed it turns white and when heated resumes its former color make alake a starch paste and add enough water to the paste to thin it then add sufficient tincture of iodine to color the liquid blue a few drops will be enough dye a white handkerchief with this blue liquid and when the handkerchief Is dry it Is ready for the trick |