Electrophotographic process, of transferring a magnetic toner to a copy member having at least 3×1013 ohm-cm resistance

Claim 1

An electrophotographic process comprising the steps of charging a photoconductive layer of an electrophotographic recording material and exposing the charged photoconductive layer imagewise to light to thereby form an electrostatic latent image corresponding to the light image, contacting the photoconductive layer carrying thereon the so formed electrostatic latent image with a magnetic brush composed of a conductive or semiconductive magnetic toner to thereby form on the photoconductive layer a toner image corresponding to the electrostatic latent image, and contacting the photoconductive layer carrying the so formed toner image thereon with a transfer sheet to thereby transfer electrostatically the image of the conductive or semiconductive toner to the transfer sheet, wherein the said conductive or semiconductive magnetic toner has a specific resistance ranging from about 10 3 to about 10 10 ohm-cm, said transfer sheet comprises a paper substrate and a toner-receiving face layer of at least one medium selected from the group consisting of resins, waxes and oils, each having a volume specific resistance of at least 3×10 13 Ω-cm, said toner-receiving face layer being formed by applying said medium on the paper substrate in an amount of 0.3 to 50 g/m 2 , and the transfer of the toner image to said toner-receiving face layer is accomplished by application of a voltage to the back face of the transfer sheet by corona discharge without substantial broadening of contours.