cathode wherein an anode for high electric current is placed opposite to the electrodeposition starting surface of the rotary cathode in such a manner that a part of the anode is projected above a liquid level of the copper electrolyte and the copper electrolyte existing between the anode for high electric current and the opposed rotary cathode surface is electrolyzed by providing a high electric current with a current density higher than that of the electrolytic anode and an apparatus for producing an electrolytic copper foil for a printed wiring board having excellent properties application_number US 8604198 A description the invention will now be described concretely with reference to the following examples and comparative examples examples 1 through 3 and comparative examples 1 through 3 are concerned with specifying an optimum range of current densities with respect to anodes for high electric current whereas examples 4 through 6 and comparative examples 4 through 6 are concerned with specifying applied time of an anode for high electric current in an apparatus for continuously producing a copper foil by letting pass an electrolyte containing copper ions between a cylindrical cathode 1 which was kept rotating and an electrolytic anode 2 positioned opposite to the.