Creative messages made easy. They are easy to use, simply peel a stamp off the backing sheet, place it on an acrylic block, ink it up and stamp. Clean your stamp with a stamp cleaner or soap and water, then return it to the sheet, positioning it to match the printed image. This special acrylic will not turn yellow. These stamps are perfect for creating cards, tags, scrapbook pages, mini books and other paper crafts. The size, shape and number of stamps per package varies by theme. Imported.