ink density
31Steganography — is the art and science of writing hidden messages in such a way that no one apart from the sender and intended recipient even realizes there is a hidden message. By contrast, cryptography obscures the meaning of a message, but it does not conceal …
32Security printing — is the field of the printing industry that deals with the printing of items such as banknotes, passports, tamper evident labels, stock certificates, postage stamps and identity cards. The main goal of security printing is to prevent forgery,… …
33calligraphy — calligrapher, calligraphist, n. calligraphic /kal i graf ik/, calligraphical, adj. calligraphically, adv. /keuh lig reuh fee/, n. 1. fancy penmanship, esp. highly decorative handwriting, as with a great many flourishes: She appreciated the… …
34Valenzuela, Philippines — Valenzuela Lungsod ng Valenzuela   City   …
35Organic solar cell — An organic photovoltaic cell (OPVC) is a photovoltaic cell that uses organic electronics a branch of electronics that deals with conductive organic polymers or small organic molecules[1] for light absorption and charge transport. The plastic… …
36Cephalopod — Cephalopods Temporal range: Devonian – Recent[1] (Stem groups from Cambrian)[2] …
37Dye-sublimation printer — Samsung SPP 2040 printing a photograph. Part of a series on the …
38Rotogravure — Gravure may also refer to Gravure idol . Rotogravure (roto or gravure for short) is a type of intaglio printing process, in that it involves engraving the image onto an image carrier. In gravure printing, the image is engraved onto a copper… …
39Photogravure — is an intaglio printmaking process initially developed in the 1830s by Henry Fox Talbot in England and Nicéphore Niépce in France. These early images were among the first photographs, pre dating daguerreotypes and the later wet collodian… …
40Whiteboard — This article is about physical whiteboards. For software based whiteboards, see Whiteboarding. A blank whiteboard A whiteboard (also known by the terms markerboard, dry erase board, dry wipe board, pen board, and the misnomer greaseboard) is a… …
