Rainbow Effect transfer foil bulk pack - excellent value for transfer foils, you get 6 sheets, each approx 24 x 17 cm (6.5 x 8 inches)
This transfer foil works beautiful over unbaked polymer clay. Just lay the foil over the clay, shiny side facing you, and burnish it well then rip away the foil. The rainbow metallic effect will be magically left in place over the foil. Check out the weblink below for my project using a different type of transfer foil and you will be able to see the process.
You can also use these foils over other surfaces too, using double-eided sticky tape or PVA glue