removed and the resulting film placed in a waring blender with dry ice and chopped for about 30 seconds particles between 20 and 80 mesh 180 850 micrometers were then collected the particles were dropped on a sheet of paper placed over a magnet sheet and the orientation of the particles visually examined in a microscope and determined to be 98 percent correctly oriented for retroreflection a primary use for retroreflectorization particles as described in the above examples is to reflectorize fabric for such a use the retroreflectorization particles should be as small as practical preferably the retroreflectorization particles of the invention include on the average no more than about 10 microspheres preferably no more than about 5 microspheres and most preferably no more than about 3 microspheres retroreflectorization particles containing more than 10 microspheres can be satisfactorily used even for reflectorizing fabrics e g by coloring the retroreflectorization particle a color that matches the fabric generally such particles will average no more than about 50 microspheres larger particles have several advantages e g they require less chopping which makes them less expensive and also causes less disruption of the retroreflective structure of the particles over the whole treated surface of a fabric of the invention there should be on the average less than about 2 000 microspheres per square centimeter preferably there are less than about 500 and more preferably less than about 300 microspheres per.