Crescent Cardboard-RENDR No Show Thru Lay Flat Sketch Book. A specially patented paper developed by Crescent that will not allow any bleed or show through from the other side of the paper, no matter what media is used. This revolutionary paper allows you to use 100% of the sketch book; no more limitations to what type of media you use in your work and no more tearing out the next page. This package contains thirty-two 5-1/2×3-1/2 inch 110 lb white heavy weight sheets. Acid and lignin free. Made in USA.