Patent ID: 6074794
Filing Date: 2000-06-13
Classification: G03G

Abstract:
A toner for dry developing, comprising a colorant and a binder and giving a toner image on a transfer sheet upon fixation, said toner image having a density I and a gloss of G % when said toner deposits on said transfer sheet in an amount of M mg/cm.sup.2, said I, G and M having the following relationship:I=a.multidot.M+bwhere 0<a.ltoreq.3 and 0.ltoreq.bG=.alpha..multidot.M+.beta.where 0<.alpha.<15 and0.ltoreq..beta., andG.sub.AV .gtoreq.10where G.sub.AV is an average of G when M=0.2, 0.4, 0.6, 0.8 and 1,wherein said binder comprises a first resin and a second resin having a glass transition point different from that of said first resin and greater by no more than 5.degree. C. than that of said first resin,wherein said second resin is a styrene-acrylate copolymer having a number average molecular weight Mn of 3,000-30,000, a weight average molecular weight Mw of 9,000-50,000 and a ratio of Mw/Mn of no more than 3, andwherein the weight ratio of said first resin to said second resin is in the range of 95:5 to 60:40.