Volcanoes (Gravure)

In gravure printing, volcanoes are tiny ring-shaped defects that appear in the printed area. They look like small craters or “volcano-shaped” spots: the center of the dot is missing ink, but there is a ring of ink around the outside.

Causes (C) and Solutions (S) of Volcanoes

Printing Cylinder Issues

C: The engraved area is too deep

S: Reduce the depth of the engraved area

Ink Issues

C: Fast evaporating solvents cause ink to dry on the surface before it can properly level out.

S: Switch to slower-drying agent

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