I've only used the light pink color once. All other colors are brand new! [Glittering Glitter POSCA] These markers have good color payoff and don't bleed or show through on the back of the paper. The newly developed water-based pigment ink achieves a glittery effect! They color vividly even on dark backgrounds, and you can write over them after they dry. They color as vibrantly as poster colors, don't damage materials, and have no unpleasant odor. You can write on various materials such as metal, glass, plastic, and mirrors. The pen tips are designed to resist clogging even when writing on materials other than paper. Even if they do clog, you can easily fix it by wiping with a tissue, etc.