Sakura Gelly Roll Glaze Pen Set, 2-Pens, Black. Glaze is a decorative art pen with raised writing you can feel! Glaze writes well on plastic and non-porous surfaces. Decorate and customize invitations, cards, CDs, vellum and plastic surfaces - they can also be used for rubber stamp embellishments, eliminating the need for powders and heat tools. For a beautiful stained glass effect, use on translucent and transparent surfaces and hang in the window. Glaze ink also resists water and can achieve the look of batik. Make secret messages by writing with clear, then sponge on color to reveal the writing or drawing.