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We seek all kinds of cooperations in gravure printing field and provide uncarved or carved gravure cylinders.
The gravure cylinder is a hollow or shafted steel cylinder used on gravure cylinder press. The cross-section of the cylinder must be as close to a perfect circle as possible, to avoid generating any "bumps" or printing distortions.
Onto the gravure cylinder base is electroplated a layer of copper, into which the image will be carved. Copper has been used as the image-carrying layer since the earliest days of intaglio printing, and it provides the highest degree of predictable, structural, and functional results. It is easy enough to electroplate and to engrave, and it also withstands increased printing pressure without causing breakdowns in the walls of the cells comprising the image. After plating the copper to the cylinder base, the copperplated surface is ground down to a reduced size, if necessary. Polishing and finishing operations ensure that inaccuracies inherent in the copperplating procedure are compensated for.
On the other hand, the images is provided or designed by customers, and was processed by our technicians with Photoshop and Adobe illustrator softwares, the customers must review the images and give their permission to start engrave. then computer-controled hig-speed(30005000 cells per second) engraver is used to carve the images on the cylinder body, The cylinders for printing different colors are engraved at a different screen and angle. The image engraved comprising many tiny cells, The cells have the shape of an inverted pyramid and their depth may vary from 1 to 50 micrometres, the distribution and depth of which determine the lightness or darkness of a particular image area.
To impart an added degree of protection and lower the coefficient of friction (thus increasing the run length of the cylinder) a thin (about 0.00023 inch) layer of chrome is electroplated on top of the engraved cylinder.
The cylinders (image carrier) used in rotogravure printing can be from three inches in diameter by two inch wide to three feet in diameter by 20 feet wide.
After engraving and chrome-plating, a test proof is printed, and any corrections are carefully made, which involves either re-carving or replating problematic areas.
After the completion of each cylinder, they are carefully packed and protected against forwarding and other effects.