High standard of quality and regularity, Clairefontaine paper. Superior quality manufacturing, from paper pulp from sustainably managed forests and bleached to neutral pH. Rigid and practical, the Bristol cards allow multiple use and writing comfort, they will be perfect for your practical work, revision sheets, memory cards, etc. Lined cards for straight, neat writing (horizontal lines) MANUFACTURING: 100% French, raw material and finished product come from the factories of the Exacompta-Clairefontaine Group. PEFC certification