Troubleshooting

 
December 12, 2012

Ghosting

Gas Ghosting/Chemical Ghosting

The transfer of a printed image from the front of one sheet to the back of another.

December 12, 2012

Tinting/Toning

Toning is the inability to remove fine ink particles that deposit on to the non — image area of the plate.

December 12, 2012

Stripping

Ink rollers cannot except or transfer ink.

December 12, 2012

Streaks

Gear streaks are always in parallel to the cylinder axis.

December 12, 2012

Scumming

Fountain solution does not have the ability to clean the non-image areas of the plate.

December 12, 2012

Roller Marks

Bands of ink that form and look like rail road tracks. They appear on the roller train and may transfer and appear in the print. They may appear in rows across the sheet anywhere from the lead edge to the tail edge.

December 12, 2012

Poor Starts

Inability for plates to clean up quickly at startup and restart of press

December 12, 2012

Poor Rub

The printed ink film is dry, but has excessive rub and scuffing when going through the delivery and finishing processes.

December 12, 2012

Poor Ink Transfer

Ink may appear to be drying out in the roller train or press seems to be unable to adequately supply the proper ink water emulsion to the plate.

December 12, 2012

Plugging

The shadows and tight reverses start to fill in and become “plugged” with ink during the run.