A book cloth having an irregular, wavy finish produced by embossing in such a manner as to resemble watered silk. Prayer books and Bibles sometimes have endpapers consisting of a folded sheet of black moiré cloth mounted on a paper flyleaf. Moiré book cloth was at one time used fairly frequently for doublures. It was also one of the earliest decorative effects applied to the calico used for publishers’ bindings.¹
¹U.S. Government Printing Office. Theory and practice of bookbinding. Rev. ed. Washington, D.C. U.S. Government Printing Office. 1962.