In the past, vellum described a writing surface made from animal hides. The vellum was sometimes slightly transparent, and that use of the term remains in use today. Vellum, a favorite paper among ...

Using transparencies with an overhead projector offers a powerful presentation tool. Many people rely on professional copy services to transfer a presentation from standard paper to transparencies.

A type of paper that has the thermal properties of glass but is flexible, foldable and optically transparent has been fabricated by scientists in Japan (Adv. Mater. 21, 1595–1598; 2009). The key to ...