ABSTRACT

This paper reports on the growth and crystallography of organic pigment particles during solvent treatment. Transmission electron microscopy (TEM) and parallel electron energy loss spectroscopy (PEELS) have been used to study crystal growth during the pigmentation process. The action of the solvent has been studied as a function of solvent concentration and time. TEM images indicated that the particles were not of uniform thickness. This was then confirmed using PEELS on a VG HB5 STEM. The information gained gives evidence for growth by both coalescence and ripening