Under the Sea, Albrecht Dürer Watercolour pencil, 7x51⁄4in (18x13.5). I used the pencils dry then added water over most of the surface with a brush to enhance the colour.
Water-soluble coloured pencils can be used dry, but for light and bright colours there are often great differences in the appearance of the colour after water is added. When drawing landscapes working with dry colours, a little water and a very small wet brush will bring out the brightness of individual grasses, or enhance the darker shadow areas. The method smooths and blends out areas where the pencil lines show. On coloured papers, using water would fade the colours into the paper.
I use water-soluble pencils dry on dark paper, but for bright highlights I touch the point of a sharp white or yellow into a drop of water and gently tap onto the paper where needed. I use this method for the brightest white areas of waterfalls, and the brightest yellow leaves. If you try this, make sure that the wood of the pencil does not get wet, and that the lead is completely dry before you sharpen the pencil.