Three and a half centuries after Rembrandt’s death, questions persist about his creative process, including the pace at which he often reworked the surface of a copper printing plate to create ...

Swastika-watermarked paper has been ordered for use in the printing of German postage stamps when the present paper supply has been exhausted, according to an item in the Deutsche Allgemeine Zeitung.

Watermarking began in Italy in the 13th century when papermakers used these marks to identify their handiwork. Eventually, specialized watermarks were commissioned. To impede forgery, for instance, ...

Digital watermarks are used much like paper watermarks, often identifying the content's creator, origin or owner. Microsoft's presentation platform, PowerPoint, is commonly used in business ...