Clairefontaine Flying Spirit Sewn Spine Notebook,4.25 x 6.75", Kraft Cover, Ruled Pages Simply the best paper in the world for writing Clairefontaine Flying Spirit vintage style notebook. The paper is heavy weight (90 g) pH neutral, acid-free ivory paper for archival quality. Cardboard cover with sewn spine. Smooth, satin fountain-pen-friendly finish. Paper made in France, notebook handmade in Morocco.