Abstract
Carbon black is generally used as the black pigment for the electron photograph toner. Safety for the human body is especially required to carbon black for toner, and it is necessary to reduce an amount of polycyclic aromatic hydrocarbon (PAH) that exists in the carbon black surface. To reduce an amount of PAH is difficult for large particle diameter carbon black. Image density, color tone, electric conductivity, and blow-off charge characteristic are demanded in carbon black. I explained how the carbon black characteristic relates to the characteristics of this demand characteristics and introduced MITSUBISHI CARBON BLACK for toner at last.
