prov:value
| - Preferred of those from the standpoint of obtaining a photoreceptor having high sensitivity are metal-free phthalocyanine, phthalocyanines having coordinated thereto a metal or metal oxide or chloride, such as copper, indium chloride, gallium chloride, tin, oxytitanium, zinc, or vanadium, and azo pigments such as monoazo, bisazo, trisazo, and polyazo compounds.
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