Hostaperm® Yellow H3G

The particle size distribution curve of Hostaperm Yellow H3G (P.Y. 154, see Figure 10-7) was determined using a transmission electron microscope. The data are presented as differential and as cumulative distributions, respectively. The excellent fastness and flow properties of Hostaperm Yellow H3G are in good accordance with the small proportion of particles less than 0.1 pm in diameter and the general observation that extremely fine particles exert a detrimental effect on fastness and flow properties. 

The reflectance curve of Hostaperm Yellow H3G between 400 nm to 700 nm (Figure 10-6) reveals that the pigment absorbs violet, blue and blue-green light while it reflects the green, the yellow and red range of the spectrum. Thus, the colorant appears greenish yellow. 

Hostaperm Yellow H3G Qariant Intern. Ltd., CH paint powder... 

Figure 10.6 Reflectance curve for a representative benzimidazolone pigment (Hostaperm Yellow H3G).

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