What is: Sheet delamination ?

This is what occurs in the printing press when a sheet has poor surface street Strength. It could result in a blanket smash. In other words, where delamination is thick and large enough and the printing press is not put off, depression would be created in the blanket and this would make the blanket unusable even after the delamination buildup has been removed. This defect can occur in web-fed equipment and sheet-fed.