This is one example of many castles in the medieval time period. There were many parts to a castle. But, it depended on how the castle was built to recognize parts that did and did not appear on the castle built.
Like spray paint, these markers give off volatile organic compounds. Some of the most recently made permanent markers are made from recycled plastic.[citation needed] The permanent marker was invented in 1952 by Sidney Rosenthal.
Nairne is now credited with the invention of the rubber eraser. The early rubber erasers were perishable and they didnât become commonly used until after 1839, when Charles Goodyear discovered vulcanization to make rubber more durable. The pencil eraser was invented by Hymen L. Lipman in 1858.