This amazing brush pen with pigment glitter and dye ink really makes your art pop! The color changes at different angles and it works well on both light and dark surfaces. It's perfect for brush lettering and decorations as well as fine art. This pen features high quality nylon bristles and a rear push system to control the flow of ink. Before you use it, make sure to shake well. Press the buttom at the end of the pen until the ink flows into the tip. If the ink color fades, press the button several times to charge. Recap after use. Store in a horizontal position. Sudden changes in atmospheric pressure or temperature may cause ink to leak.