-Pastels are created using the same pigments found in other art mediums such as oil paints.

-They are made by combining pure, dry color pigment with simple gum or methylcellulose-based binders which are then formed into round or square sticks.

– Once applied, the color does not dry lighter or darker because it does not need to cure.

– Over time a work in pastel does not crack, yellow, fade or blister as liquid media can.

– Works in pastel remain more brilliant and colorful and are more permanent than any other traditional art medium because the pigment is less adulterated.

 

The above information is taken from the International Association of Pastel Societies (IAPS) brochure entitled Pastel: Painting with Pure Pigment.