Vidalon is a highly transparent, imported natural tracing paper of exceptional quality from the Canson mill in France. Natural vellum is transparentized without oil, unlike typical American-made tracing vellums. All of the Vidalon papers have a specially developed surface designed to take pencil or ink without smudging, yet allow repeated ghost-free erasures. Also suited for markers, holding color intensity without bleed-through. Vidalon Heavy 90 GSM Pad - 55 lb., 50 Sheet.