|Como 80lb (130 gsm) heavyweight sketch is a hard, clean, natural white sheet with excellent erasing qualities. This paper has an excellent tooth and is double sized to accept wet media. For use with pencil, pen and ink, and light washes. The original Co-Mo weighed in at a more than sufficient 70lb for an artist sketch paper. We've pumped up the sheet to an 80lb heavier weight which will soon be available in all sizes.