In terms of strength, a positive charge on the protein coating binds to a negative charge on the top and bottom surfaces of the hexagonally-shaped chalk tiles. This 'glue' is strong enough to hold layers of tiles firmly together, but weak enough to permit the layers to slide apart, absorbing the energy of a heavy blow in the process.
Read the rest of the story HERE:
Born in Long Island public school year in Sweden as exchange student, went to Harvard one year, Cooper Union in NYC as Art student. Have two children, one of whom is rock mogul, the other has three daughters, one of whom has two daughters, making me (more...
|The views expressed herein are the sole responsibility of the author
and do not necessarily reflect those of this website or its editors.