Aquabee Gateway DeLuxe Tracing Vellum - These pads have 25 sheets of 68lb tracing vellum. Aquabee calls this paper vellum, which may be confusing to some people because vellum is usually a semi opaque white paper. The paper in this pad is heavy duty tracing paper with excellent clarity, at about half the price of other brands of heavy duty tracing paper. The finish is medium-smooth and will take pencil, pen & ink, pastel, and just about any other dry media. This is an outstanding paper for design, comps, layouts, preliminary visuals, and for use as tracing paper. Acid free.