A concentrated color developer composition packed in a container which is comprised
of material exhibiting an oxygen permeability of not more than 50 ml/(m2dayatm),
and the concentrated color developer composition comprising a hydroxyalkyl-substituted
p-phenediamine type color developing agent of not less than 0.05 mol/l, a sulfite
and a hydroxylamine salt. The processing method by use of the concentrated composition
is also disclosed.
