The technique is to draw dry and then dissolve with a wet brush, which turns line into wash. That makes the paper the constraint rather than the pencil: standard cartridge buckles the moment it gets wet, so heavier stock is not optional. Work light to dark, since dissolved pigment cannot be lifted back out easily. See watercolour pencils, art paper and paint brushes.

Water soluble graphite pencils in a bright artist workspace with sketchbook drawings, brushes and blending supplies.

Water Soluble Pencils for Art Projects

Water soluble pencils for drawing, blending and colour washes. Ideal for artists, students and classrooms.