The real brush tips on these markers are ideal for illustrating and sketching on paper. They also work great for creating both narrow and wide lines. The plentiful grays are ideal for cartooning. The water-based dye is odorless and xylene-free. Conforms to ASTM-D4236 standards. The 12-Color Set includes black, blue, brown, carmine red, cobalt blue, green, light gray, light green, light violet, orange, pink and yellow.