You can using this for pressing your own mineral pigments Pans are generally for pressed powders, as well as for hot pour and cold process cosmetics. Fits with any 20mm Mac eyeshadow Palette. This makes tin pans a perfect choice if you are placing them into any type of magnetic palette. These heavy duty pans are great for pressing pigments, melting lipsticks, and other arts and crafts projects. Tin pans are great for creating your own combinations and refilling your favorite cosmetics products for your palettes.