Shoe Wear
                The high concentration of mineral filler is evident along
                  the edge of this particle. Without reflected darkfield
                  illumination the color of the particle can't be determined.
              
              
                Transmitted Off Crossed Polarized Light Illumination
                
Definition/Function:
                Shoe wear particles as presented here refer to shoes with an elastomer sole. These may
                be a variety of colors but tend to have a very high
                mineral filler content, typically calcite. They may also have a high plasticizer
                content. Some are acetone soluble.
                Significance in the Environment:
                shoe wear particles are common in high occupancy indoor spaces.
                Characteristic Features:
                Shoe wear particles have a much higher mineral filler content than tire or belt-drive
                wear particles. The mineral filler particles also tend
                to be much larger than that in tire or belt-drive wear particles.
                Associated Particles:
                References: