"These chunky XL blocks have all the qualities of charcoal that you love. Incredibly versatile and naturally water-soluble they can create a wide range of textures and effects. The blocks come in 6 muted shades from Sanguine and Violet to Sepia and Ochre. Contains one block of each colour: Ochre, Sanguine, Mars Violet, Sepia, Black, White. The blocks come in 6 muted shades from Sanguine and Violet to Sepia and Ochre. Naturally water-soluble you can use them on a damp surface and release lots of colour really quickly and build up layers of different colours as you go."