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 1.0 to 7.0 and a carrier
water adsorption ratio (C) obtained by a following equation (2) 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
(TH) of the toner particle/an N2 adsorption amount
(TN) of the toner particle (1),
- a carrier water adsorption ratio (C)=a water adsorption amount
(CH) of the carrier particle/an N2 adsorption amount (CN)
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).
