Patent ID: 6562538
Filing Date: 2003-05-13
Classification: G03G

Abstract:
A color toner having a charge rising property Z not less than 70%, and wherein the charge rising property Z is represented as follows:Z=(Q20/Q600)Ã—100 wherein Q20 represents a charge quantity of the toner when a carrier including the toner in an amount of not greater than 5% by weight is agitated for 20 seconds at a temperature of from 15 to 25Â° C. and a relative humidity of from 25 to 80%, and Q600 represents a charge quantity of the toner when the carrier is agitated for 600 seconds at a temperature of from 15 to 25Â° C. and a relative humidity of from 25 to 80%,wherein the toner when sieved with a sieve of 500 mesh, provides a residual toner remaining on the sieve having a circular degree of from 0.93 to 0.97 and a weight not greater than 10 mg when a pre-sieve weight is 100 g, and wherein the toner does not comprise a release agent.