The small holes where ink fails to be printed, mostly found in solid printing.

Press stability means how stable the properties of the ink, especially viscosity, are maintained on the screen. The change of the density, the increase of the viscosity, clogging : these are the problems that should be avoided in the printing process. UV curable ink, which contains no solvent, is excellent in press stability, although smearing may happen in some cases.

The properties which the ink should have in order to give the required finish. That includes the proper viscosity and thixotropy, the right properties of the dried ink film, right finish( glossy or matt) and right colors.

The pressure applied to the printed material by squeegee.

Printed ink protruded from the image. This tends to happen when the viscosity of the ink is too low.