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The lithographic process relies upon a stable ink/water relationship with ink generally absorbing approximately 20% of damping water to form a stable emulsion. The following problems can occur when this emulsion is out of sync.

  • Increased dot gain
  • Picture framing on blankets
  • Background tinting on plates
  • Poor ink drying and scuff resistance

To overcome these problems the following points should be observed:

  • Ensure that the water entering the circulating system has a hardness of between 10-14dH German harness (IPT technicians can undertake this task)
  • Ensure dampening additive is dosed in accordance to the water hardness.
  • Ensure inking rollers a free of calcium deposits
  • Check temperature of fount dampening solution.
  • Check ink and dampening roller settings.

Fount Solutions & Additives

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