The best water-soluble pencil we've ever used is the Derwent Inktense pencil! They work well when dry, but when combined with water, WOW! The hue becomes a vivid ink. Its permanent feature makes it ideal for use on fabrics like silk and cotton. Once it dries, the color is fixed, allowing you to work over it! Permanent, water-soluble, fine artist pencils with a firm texture and a 4mm round barrel that are very blendable and appropriate for painting on fabric. A novel mixture that functions as ink and produces incredibly vivid colors that dry permanently and do not wash out for outstanding layering superior performance using active color technology that has been carefully formulated; Water activates pigments with rich colors, making them more intense; Light permanently washes dry. Ideal for