Measurement | Forward Up (Beginning Observations) Main Page |
 | Particle size
is often an important characteristic. Some pigments have both natural (ground)
and synthetic (precipitated) forms. Precipitated pigments are typically
one micron or less in diameter while ground pigments are usually larger
than five microns diameter. Often equally important is the distribution of particle sizes. Statistical methods are sometimes employed to determine the distribution (and may be found in the microscopy literature) How big are the azurite (blue) and quartz (colorless) crystals shown at the left? |