Yamanashi Electronics Co., Ltd.

Zeon Corporation

Toyo Tire Rubber Co., Ltd.

Shindengen Electric Manufacturing Company Limited

Shin-etsu Polymer Co., Ltd.

Fuminori Tsuruta

Masahiro Ikeda

Kazunori Shigemori

Kenichi Fujimori

Masahiro Horigome

Tomoharu Takeuchi

Kazuhito Dohi

Tsuneo Isomura

Tadaichi Murata

Sokuei Motoda

Muneharu Ito

Toshiyuki Nagai

Toshiro Murano

Sachio Oomori

Yoshitarou Nakayama

In an image forming method including a charging step, an exposure step, a development step using a developing roll, a transfer step, a fixing step and a cleaning step of removing a toner remaining on the surface of a photosensitive member after the transfer step, the developing roll has a surface brightness of 30 to 220 and a surface roughness Rz of 1 to 20 &#x3bc;m, the cleaning blade is a cleaning blade made of a polyurethane elastomer and having a peak value of at most 0.95, a peak temperature of &#x2212;15 to 10&#xb0; C. and a width at half maximum of at least 25&#xb0; C. in viscoelasticity tan &#x3b4;, the toner has a volume average particle diameter of 4 to 10 &#x3bc;m and an average circularity from 0.950 to 0.995, the charge level of the toner on the surface of the photosensitive member is 10 to 80 &#x3bc;C/g in terms of an absolute value, and the pH of a water extract of the toner is 3 to 8.

Image forming method

An electrophotographic photoreceptor having a photosensitive layer containing a butadiene compound represented by general formula ##STR1## wherein A.sub.1 to A.sub.4 are alkyl group, and a hydrazone compound represented by general formula ##STR2## wherein B.sub.1 and B.sub.2 are alkyl, phenyl, benzyl or methoxyphenyl groups, R.sub.1 is hydrogen, alkyl, alkoxy or benzyloxy groups and R.sub.2 is alkyl, phenyl or benzyl groups. The photoreceptor can suppress the photo-deterioration due to cyclic operation and is useful in the field of copying printers.

Electrophotographic photoreceptor

Growing community of inventors

Yamanashi, Japan

Fuminori Tsuruta