In a method of producing a grain-oriented electrical steel sheet comprising subjecting a steel slab containing no inhibitor-forming components to hot rolling, cold rolling, primary recrystallization annealing working also as decarburization and to final annealing causing secondary recrystallization after applying an annealing separator on the surface, the final cold rolling for cold rolling the steel sheet to the final thickness uses a warm rolling with a tandem rolling mill at a total rolling reduction of not less than 80% at 150 to 280? C. and is performed by extending a pass line length of the steel sheet between the stands so that T satisfies T?1.3?L/V, where an distance between the stands is defined as L(m), a speed of the steel sheet passing between the stands is defined as V (mpm), and a pass time during which the steel sheet passes between the stands is defined as T(min).

A ratio of a total surface area of aluminum particles pressed into or adhering to a region having a predetermined surface area to the surface area of the region is less than or equal to 0.05%. The total surface area of crystallized products present in the region is less than or equal to 2% with respect to the surface area of the region. An average surface area per crystallized product is less than or equal to 2 ?m.sup.2. Surface roughness Ra of the region is less than 20 nm.

A ratio of a total surface area of aluminum particles pressed into or adhering to a region having a predetermined surface area to the surface area of the region is less than or equal to 0.05%. The total surface area of crystallized products present in the region is less than or equal to 2% with respect to the surface area of the region. An average surface area per crystallized product is less than or equal to 2 ?m.sup.2. Surface roughness Ra of the region is less than 20 nm.

A printing machine with a cold foil roller includes a printing plate roller, an ink roller set, a transfer roller, a material catching roller and a hollow roller inside a chassis. The hollow roller contains a wheel wall, a driving motor, an infeed wheel and an outfeed. The driving motor is connected to a control element, and the outfeed wheel has a cold foil with an end wound from a side inside the hollow roller to the outside and attached from an outer surface of the wheel wall to the other side inside the hollow roller and then fixed to the infeed wheel. The driving motor is provided for transmitting the infeed wheel to send/receive cold foil, and the driving motor rotates with the hollow roller asynchronously to avoid wasting the cold foil caused by the synchronous operation of the driving motor and the hollow roller.

A printing machine with a cold foil roller includes a printing plate roller, an ink roller set, a transfer roller, a material catching roller and a hollow roller inside a chassis. The hollow roller contains a wheel wall, a driving motor, an infeed wheel and an outfeed. The driving motor is connected to a control element, and the outfeed wheel has a cold foil with an end wound from a side inside the hollow roller to the outside and attached from an outer surface of the wheel wall to the other side inside the hollow roller and then fixed to the infeed wheel. The driving motor is provided for transmitting the infeed wheel to send/receive cold foil, and the driving motor rotates with the hollow roller asynchronously to avoid wasting the cold foil caused by the synchronous operation of the driving motor and the hollow roller.

Provided is a clad steel plate with excellent thermal conductivity that can be used suitably in cookware and the like. The present invention is a three-layer clad steel plate having a carbon steel base material and stainless steel mating material disposed respectively on both surface sides of the base material, wherein a plate thickness ratio L given by Equation (1) is 1.0-5.0 and at least one surface of the clad steel plate has a plurality of protrusions and recesses. Plate thickness ratio L=the plate thickness of the base material/the total thickness of the mating material . . . Equation (1) Here, the base material thickness and the mating material thickness are the thicknesses at the protrusions.

Provided is a clad steel plate with excellent thermal conductivity that can be used suitably in cookware and the like. The present invention is a three-layer clad steel plate having a carbon steel base material and stainless steel mating material disposed respectively on both surface sides of the base material, wherein a plate thickness ratio L given by Equation (1) is 1.0-5.0 and at least one surface of the clad steel plate has a plurality of protrusions and recesses. Plate thickness ratio L=the plate thickness of the base material/the total thickness of the mating material . . . Equation (1) Here, the base material thickness and the mating material thickness are the thicknesses at the protrusions.

A method for cold rolling rolled stock (2) in a mill train (1) with multiple roll stands (3 to 7). An upper limit temperature and/or a lower limit temperature is provided for a rolled stock temperature of the rolled stock (2) for at least one rolling pass, and the rolled stock temperature is controlled and/or regulated by at least one control or regulating measure such that during the at least one rolling pass, the rolled stock temperature does not exceed the upper limit temperature specified for the rolling pass and/or the rolled stock temperature does not fall below the lower limit temperature specified for the rolling pass.

A method for cold rolling rolled stock (2) in a mill train (1) with multiple roll stands (3 to 7). An upper limit temperature and/or a lower limit temperature is provided for a rolled stock temperature of the rolled stock (2) for at least one rolling pass, and the rolled stock temperature is controlled and/or regulated by at least one control or regulating measure such that during the at least one rolling pass, the rolled stock temperature does not exceed the upper limit temperature specified for the rolling pass and/or the rolled stock temperature does not fall below the lower limit temperature specified for the rolling pass.

Provided is a method for rolling a steel sheet and a method for manufacturing a steel sheet capable of preventing occurrence of defects in appearance of a steel sheet caused by oil spots of a coolant and preventing occurrence of defects in shape of a steel sheet by appropriately controlling thermal deformation of work rolls. The method for rolling a steel sheet according to the present invention is a method for rolling a steel sheet involving feeding of a coolant to rolls that form a rolling mill during the rolling. The method includes keeping a coolant feeding rate at or lower than a predetermined rate lower than an upper constant rate at a start of operation of the rolling mill, and increasing the coolant feeding rate to the upper constant rate in response to an amount of center buckles of the steel sheet reaching or exceeding an upper target value.