TRIBOLUMINESCENCE OF SUGAR
NEEDED

     -  Cube of sugar
     -  Flat-nose pliers

PROCEDURE

         In a completely dark room with your eyes
     adapted to the darkness: press a cube of sugar
     and a short, faint, blue triboluminescence.

COMMENTS

         An utterly unexpected effect, which really is
     only visible in absolute darkness and only after
     the eyes are adapted to the darkness (> 1 min).



Pliers and sugar cube.