Borden & Riley - Thumbnail Soft Tone Sketch Paper - 18lb Roll - Canary - 12in.x50yd - Thumbnail Soft Tone Sketch Paper by Borden & Riley Paper Co. is the ideal paper for the architect, engineer, illustrator and student. It responds beautifully to pencil, ink, chalk or felt tip markers. Soft Tone Sketch Paper is fortified to withstand considerable handling and yet is transparent enough to read an original through a four sheet overlay. This type of paper is also known as a Bumwad; Fodder and Pattern Paper. This roll of 18lb Soft Tone Sketch Paper feature a canary yellow color.