verbal-of or relating to or formed from words in general; verbal ability. 3. verbal-of or relating to or formed from a verb; verbal adjectives like `running' in `hot and cold running water'. 4.
The company's zBoard is a material made up of 99 percent post-consumer recycled paper (the remaining 1 percent is paper as well), completely recyclable and less than half the weight (with the same strength) of particle board.
(April 2008). A quadruple blackboard at the Helsinki University of Technology. A blackboard (UK English) or chalkboard (US English; also blackboard) is a reusable writing surface on which text or drawings are made with sticks of calcium sulfate or calcium carbonate, known, when used for this purpose, as chalk.ticks of processed chalk are produced especially for use with blackboards in white and also in various colours. These are often made not from chalk rock but from calcium sulfate in its dihydrate form, CaSO 4 Â·2H 2 O (gypsum). Chalk sticks containing calcium carbonate typically contain 40-60% of CaCO 3 (calcite).