Pigment electron photomicrograph

It seems more important to focus on problems that may arise in the course of a quantitative evaluation of electron photomicrographs of an organic pigment. Automatic image analyzers cannot extract information from images which indicate more or less agglomerated, nonisometric, or even platelet-shaped particles. 

The electron photomicrographs in Figs. 45-47 show the degradation of a number of pigment-vehicle systems in response to irradiation and weathering. These... 

The shade of a product is another parameter which is influenced by the particle size (Sec. 1.6.1.2). This is easy to see by comparing the reflection curves of two Pigment Yellow 83 white reductions in an alkyd-melamine resin system. The electron photomicrographs in Fig. 65 and the particle size distribution histograms in Fig. 66 represent these samples. At equal pigment concentration, curve 1 of the two remission curves in Fig. 67 reflects the behavior of the pigment with the smaller... 

Scanning electron photomicrographs of typical rutile titania pigments treated with various organic and inorganic coatings are provided in Figures 10.4 and 10.5. 

THI pigments are proprietary pigments from Clariant, and are not yet commercially available. A typical electron photomicrograph of a THI Red is shown in Figure 20-11. 

Fig. 2.5 Electron microscope photomicrographs of two paint pigments showing how particles can be aggregates of finer particles [2].

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