What are causes of slurring in web offset printing?

Slurring in web offset printing can be caused by several factors, including misregistration of the printing plates, improper ink viscosity, and excessive ink transfer. Additionally, substrate issues such as surface tension or moisture content can affect ink adhesion and lead to slurring. Equipment malfunctions, such as worn rollers or incorrect blanket pressure, can also contribute to this problem. Proper maintenance and calibration of the printing press are essential to minimize slurring.