What causes web marks?

In screen printing on glass, ink films sometimes show web marks or mesh patterns. The primary cause of these marks is poor ink flow. During the printing process, when the screen is lifted, the ink transferred onto the glass should ideally flow to fill in the mesh patterns, resulting in a smooth and even surface. However, if the ink has poor flow properties, it does not spread adequately, and the mesh marks remain visible, leading to an uneven ink film surface.

To prevent web marks from appearing on printed glass, the following methods can be employed:

Use Inks with Good Leveling Properties: Selecting an ink with high flow and levelling capabilities can help ensure the ink spreads evenly after being printed, filling in any mesh marks and creating a smooth surface.

Opt for Slower-Drying Inks: Using slower drying speed allows the ink to flow and level out before solidifying. This extended flow time helps the ink fill in mesh marks and cure naturally.