Specially prepared for artists’ use, the wood used for Winsor Newton's vine charcoal is correctly baked to produce an even line of consistent intensity. capable of very fine lines as well as broad bold strokes. Charcoal Sticks are ideal for artists of all abilities who love the rich, timeless medium of charcoal. These charcoal sticks are made of grape vines that have been burnt to a specific hardness. Unlike compressed charcoal, vine and willow charcoal doesn't use a binding agent which results in clean erasing. Winsor & Newton Vine Charcoal is of the highest quality and carefully selected for uniformity without imperfections. Smooth and rich, these charcoal sticks produce lines of consistent intensity. Use in conjunction with other Winsor & Newton charcoals in this range.