Daler-Rowney's comprehensive range of artists' accessories has been selected to offer discerning artists the very finest tools. Daler Rowney Artists Natural Sponges are used by many watercolourists as well as other artists and craftspeople. They make useful tools for lifting colour from wet paintings or adding texture by lifting a pattern or bits of colour from your watercolour painting. They are also tough yet gentle for scrubbing a dry watercolour to lift the colour and hold more water than foam sponges. To maintain their "good health" it is necessary to rinse them in cold, clean water after use and squeeze out gently any excess water and leave to air dry.