A carbon black friendly to the global environment and a rubber composition containing the same, that is, a carbon black obtained from, as a starting material, a tall oil having an alkali metal ion concentration of 1000 ppm or less and a rosin content of 5 to 90% by weight and a rubber composition containing the same.

 
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< Toner, developer, toner container and latent electrostatic image carrier, and process cartridge, image forming method, and image forming apparatus using the same

> Papermaking chemical, method for manufacturing same, and paper containing same
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