Pastel document holders are typically made from durable polyurethane. Some pastel pen barrels are made from renewable or reclaimed materials, such as wheat straw.
Many pastel pens include rubberized or contoured grips for added comfort during long writing sessions, and some models use retractable click designs for easy, one-handed use.
Erasable pastel inks are thermo-sensitive and can be removed by friction or affected by heat. Because the ink can disappear with heat or erasing (and may be restored by cooling), these inks are not recommended for legal or official documents.
