The blanket for Offset printing is extremely essential part of process of printing and has immediate impact of great high quality of printed picture. It has to be designed to meet very great requirements not only to exchange a great quality picture from the plate to the blanket, but will work at great rates of speed with different documents.
At the same time, it also has to show dampening solution equally, and correct problems in depth in the printing stock. The most essential features that blanket for offset printing must have are:
– Tensile Strength –Printing Blankets should only be stiffened around the cyndrical tube with just as much power as they need to not move on the run, nothing more. The reason being is that the tensile durability, or the ability of the weaved material to hold up against the take around the cyndrical tube, is only so powerful. The essence is to have the blanket expand as little as possible for two reasons:
1.) The blanket can rip.
2.) Blanket size is lost as more twisting is used to the installed blanket.
Stretch – There is usually at least one part inside the blanket that created stitched material. This is the power of the blanket that keeps it together. It is stitched in such a way that the most durability is given to the circumferential property. When shrinking the blanket, a certain amount of expand will happen as these discussions take on one another. However overdoing it will cause your blanket size to go down and even rip the blanket.
- Squareness – Printing Blankets producers will sometimes send blankets that are not completely rectangle. Or perhaps, they were not rectangle to how the material was stitched. This will cause major stress and slur problems so always must be a great quality check before increasing blanket on sheet feed press.
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