The Gelly Roll range has a unique gel-ink technology that produces a smooth result when writing thanks to Sakura's advances in ink production and the high quality water-based pigment. The Metallic pens are a superb roller ball pen with a high quality metallic ink. They are non toxic, archival, waterproof and fade resistant. They do not smear or bleed through most papers, will write on both matt & glossy surfaces and are suitable for both light and dark paper. The ink is very dense and comes out in a smooth, constant flow. Sakura Gelly Roll Metallic pens are available in 14 metallic colours and have a 1.0mm nib. Before use, remove any protective caps that may cover the nib and dispose of it. The ink will start to flow as soon as the point is pressed on the surface. Store the pens horizontally with the cap on.