Are they water soluble ?
Hi Dinie, Derwent Coloursoft are one of the softest of the coloured pencils but these are amazingly strong and vibrant range of colours. The velvety softness of the strip releases rich, dense colour at a stroke and is perfect for mixing and blending. Despite its soft texture, Derwent Coloursoft sharpens to a fine point.
These are the wax based core coloured pencil which is not water-soluble. You can blend using mediums like Solvents, pencil blender medium or pens, some even use baby oil.
Hope this information helps, Kind Regards