UPDATE: foil w/gesso & alcohol inks. Did some investigating...a Tim Holtz embossing folder titled "Patchwork" is used. Emboss a piece of craft metal or aluminum foil with the Tim Holtz pattern...gesso the whole thing...after the gesso dries, color with the alcohol ink(s) of your choice.
Metal Tags and Labels using super strong aluminum foil. First, adhere foil to cardstock or chipboard, then send through bigshot using embossing folder, then cut out tag using die. You can also use foil tape. You can use alcohol ink to color or StazOn.