1 x pen These pens are great; you can use them on so many of your projects, not just paper crafts. They work really well on our transparencies (acetate). Here are some of the manufacturer’s thought on their product: Most inks slide and run off smooth surfaces; Glaze clings to most non-porous materials. Want to write or decorate on a CD? Glaze works great. While Glaze requires a longer drying time than most pens, it works well for the patient crafter on non-porous surfaces like iridescent Mylar®. Wedding invitations, gift cards, handmade stationery, altered books – besides providing tactile sensation, Glaze’s texture gives your projects emotional depth as well. True writing you can feel! Write or draw with Clear Glaze – then reveal birthday wishes or other secret messages by sponging colour over the surface. Water-resistant Glaze acts like a “resist” to create the look of batik. Let your creativity and imagination discover the many dimensions of Glaze. Glaze colours come out bright, glossy and iridescent and will brighten up any craft, rubberstamping or paper craft project. These are just a few of the possibilities for the use of Glaze.