caran d'ache watersoluble crayons

This is an experiment using Caran D'ache neocolor II watersoluble crayons on canvas pad 6x9in.It works fine on this support only that you need a fine brush and little water but carefully cover all areas. My mistake was to use a plastic brush too big for the job and loaded with water.The crayons have very strong pigment and only a little dot can make a mark by adding water.