(1) The wet mixtures for millboard , paper, and asbestos-cement products are prepared in a beater, as used in paper mills.(2) After and during forming, the millboard sheet is compressed to give it uniform thickness and to consolidate it.(3) It is best to keep two ploughs in use, one for the millboard cutting, and one for the edges of the books.(4) Those were the days when the craft of bookbinding involved working with linen thread, webbing, animal glues, vellum, leather, millboards and handmade papers.(5) In the early 16th century, they started to make cover cores with millboards , which were produced by gluing together sheets of paper.(6) The more important lightweight sketching supports in the 19th century were academy boards and millboards .
