Colour	Blue
Thickness	1.97/1.70±0.02mm(3ply)
Compressible layer	Microspheres
Surface	Micro- ground and polished
Roughness	0.90-1.1μm
Hardness	76 - 81 Shore A
Elongation	≤1.1%
Tensile strength	≥80
Speed	10000-12000 sheets/hour

1.Check the flatness of its surface. The way to check is to print the full version, but the printing pressure should be lower than the normal pressure. In this way, the non-uniformity of its surface can be exposed. If the pressure is too large and the field is thick, it is difficult to see the difference. 2.If the unevenness of the surface is unacceptable (the specific indicators can be judged by experience), check the surface uniformity of the blanket and liner and whether there are foreign matters on the surface of the drum. After removing the foreign matter, if the non-uniformity still exists, the method of drawing "map" can be adopted. First draw every low (or weak) place, and then stick a sticker on the back of the blanket (the thickness of the paper is selected according to the situation).