Designer Liners by Mayco are versatile, underglaze-like pigments that come packaged in a bottle and are applied via slip-trailing - and they can be applied to clay in virtually any state. Use on greenware, bisqueware, or even on top of glaze. Their firing range is wide, from cone 06 all the way up to cone 6, and they leave behind an opaque, slightly dimensional line. This product isn’t glassy like a glaze, so it stays put on a surface -- even under a glossy topcoat. This is an easy way to introduce a great decorative element into your studio, because Designer Liners are awesome for drawing delicate designs or writing on your projects.