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.
Transcript of Are permanent markers really permanent? Are permanent markers really permanent? Mary Rhea 7th grade John Roberts how permanent are permanent markers on different materials and how do they react to different solvents? The purpose of this experiment is to figure out what gets permanent marker out of different everyday materials.