Patent ID: 6905806

Claim:
A dry two-component developer for electrophotography comprising a carrier particle and a toner particle, wherein a toner water adsorption ratio (T) obtained by a following equation (1) for the toner particle ranges from 01.0 to 7.0 and a carrier water adsorption ratio (C) obtained by a following equation (2) for the carrier particle is 20.0 or less, and a water adsorption ratio (T/C) expressed in a following equation (3) representing a relationship between the toner water adsorption ratio (T) and the carrier water adsorption ratio (C) is 5.0 or less; a toner water adsorption ratio ( T )=a water adsorption amount ( T H ) of the toner particle/an N 2 adsorption amount ( T N ) of the toner particle (1), a carrier water adsorption ratio ( C )=a water adsorption amount ( C H ) of the carrier particle/an N 2 adsorption amount ( C N ) of the carrier particle (2), and a water adsorption ratio ( T/C )=a toner water adsorption ratio ( T )/a carrier water adsorption ratio ( C ) (3).