Recreate beautiful patent drawings illustrating centuries-old brilliant ideas. Trace over 30 patent drawings, and Voila! You have a body of your own artworks. ** 16-sheet artbook with tracing paper Enjoy retro-style of centuries old patent drawings. Awaken your creative instinct with portable artbook. Be inspired by brilliant ideas by ingenious minds of the past. Separable individual drawings are great as a gift. Sugarcane paper makes the artbook eco-friendly.