Also, the fractured TiC ceramic particles due to pressing pressure are embedded as very small fragments, particularly within softer aluminum particles. Figure 5 Optical microscope images for ZA-27 ...

In terms of quantity, the stool samples contained, on average, 20 particles of plastic, ranging in size from 50 to 500 micrometers. (For comparison, a human hair is about 100 micrometers thick.) ...