Foil stamping machines use heat to transfer metallic foil (often gold or silver) onto paper. They can be customized into different patterns and sizes. Foil stamping comes in a variety of colors, and produces a shiny, metallic, elegant finish. It is most commonly used for the lettering of book titles, greeting cards, company logos, presentation folders, catalogs, etc. Foiling stamping is a more efficient way to create a high quality, reflective image, rather than using metallic ink. Metallic inks tend to produce a faint, simulated metallic appearance. The natural tendency of the ink is to be absorbed into the stock, generating a dull appearance. True metallic foils are not absorbed into the substrate; therefore they appear to be more realistic and pleasing.