The document discusses test forms from Fogra and Heidelberg that can help identify problems in print quality by highlighting issues and their causes. It describes how Fogra developed a dampening control test form that allows printers to check and correctly regulate dampening solution application in order to achieve stable printing conditions. The test procedure involves first setting solid colors using ink density, then reducing dampening to the point of smearing while maintaining full toning to find the ideal balance of ink and dampening solution.

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Perfect print
• Perfect print results require ideally set machines
• The test forms from Fogra and Heidelberg offer effective support by
highlighting typical problems and their causes in the print image.

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IDEAL PRINT QUALITY (cont’d)
• Previously, machine set-up and therefore indirectly also the regulation
of the balance between ink and dampening solution took place by
measuring the ink density of the control patches on the edge of the
printed sheet

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CREATING UNIFORM PRINT
CONDITIONS
• Fogra therefore developed a dampening control test form which makes
it possible to check and correctly regulate dampening solution
application.
• With the test form and the corresponding adjustments, stable printing
conditions can be achieved reliably in the printing presses.

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IDENTICAL PRINT TEST PROCEDURES
• The print tests take place in all inking units according to the same
procedure:
First, the solid colors are set with as high a concentration as
possible only by varying the inking ductor rate without changing
the usual mechanical settings

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IDENTICAL PRINT TEST PROCEDURES
(cont’d)
• As soon as the target density range has been reached in all zones,
dampening can be reduced to the point of smearing as well as full
toning in one next step.
• If the printer wants to find out the range of dampening, over-
dampening can also be tested.

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• An ideally adjusted balance of ink and dampening solution shows only
minimal deviations in tonal value analysis at various levels of
dampening.
• Illustrations 1 and 2 show the printed sheet in the case of an ideally set
printing press with over-inking and under-dampening.
SUITABLE FOR NEARLY ALL TYPE OF
PRESSES

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• The Fogra dampening control test form is suitable for nearly all types
of printing presses and smooth printing stocks, that can be
used including all combinations of
 Inks
 Dampening solution additives
 Plate types
 Printing blankets
 Roller materials.
SUITABLE FOR NEARLY ALL TYPE OF
PRESSES

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