| 摘要 |
PROBLEM TO BE SOLVED: To provide excellent durability of a blanket out of a sheet width when printed with a hollow cylinder by providing a silicone rubber layer having a specific thickness on a base, mounting a plate material for the cylinder at a lower hollow plate cylinder of an offset rotary press, and printing. SOLUTION: As a base, preferably a metal plate, a plastic film, or particularly preferably a metal plate mainly containing an aluminum is used. Its thickness is 0.15 to 0.5 mm or preferably 0.24 to 0.3 mm. As a silicone rubber layer, its thickness is 0.5 to 50 μm, preferably 0.5 to 20 μm or more preferablly 0.5 to 10 μm. If the thickness is thinner than 0.5 μm, a trouble occurs in view of plate wear resistance and ink repellence, while, if it is thicker than 50 μm, it is disadvantageous in its economy. For example, in a double-sided four-color offset rotary press using a dampening water, when printed with four color upper cylinders and 3-0 color lower cylinders (when printed with hollow cylinders), it is printed by mounting the plate materials for hollow cylinders as plate cylinders (hollow cylinders) of non-printing color. |
