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Industry

Printing Inks And Overprint Varnish

Waterborne and UV inks, inkjet and overprint varnish, where dynamic surface tension and carbon black behaviour set the limits.

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Where It Goes Wrong

  • Craters and pinholes appearing only at full line speed
  • Carbon black concentrates thickening to unusable viscosity in storage
  • APEO-containing additives blocked by a customer restricted substance list
  • Overprint varnish losing gloss when a levelling agent is added

What Formulators Ask For

  • Additives that work on dynamic rather than only static surface tension
  • APEO-free dispersants for carbon black and inkjet
  • Levelling that raises gloss without affecting recoat
  • Concentrates stable enough to tint several different bases
Recommended Products

The Grades That Apply Here

QK706E Wetting and Defoaming Agent product identification panel
Wetting and Defoaming

QK706E Wetting and Defoaming Agent

Gemini non-ionic surfactant that cuts dynamic surface tension and suppresses foam in waterborne coatings, inks and adhesives.

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QK702 Fluoro-Modified Acrylate Levelling Agent product identification panel
Levelling

QK702 Fluoro-Modified Acrylate Levelling Agent

Polyacrylate levelling agent for waterborne, solventborne and UV systems that lifts gloss without hurting recoatability.

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QK3730 Wetting and Dispersing Agent product identification panel
Wetting and Dispersing

QK3730 Wetting and Dispersing Agent

APEO-free dispersant built for carbon black and organic pigment in waterborne ink, inkjet and leather coatings.

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QK3755 Wetting and Dispersing Agent product identification panel
Wetting and Dispersing

QK3755 Wetting and Dispersing Agent

VOC-free block copolymer for resin-free waterborne concentrates carrying 30-60% pigment.

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QK3740 Wetting and Dispersing Agent product identification panel
Wetting and Dispersing

QK3740 Wetting and Dispersing Agent

100% active polymer dispersant that adds no carrier to waterborne coatings, inks and concentrates.

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Typical Application Scenarios

  • Waterborne flexo ink cratering above a certain press speed
  • Inkjet ink needing a carbon black dispersion that will not thicken
  • UV overprint varnish graded on gloss
  • Universal tinter that has to work in more than one base

How We Supply

  • Dynamic and static surface tension figures are published for QK706E
  • APEO-free status is stated in writing on QK3730
  • Pigment content range for resin-free concentrates is published for QK3755

Related Solutions

Guides For This Industry

Questions

Printing Inks And Overprint Varnish Questions

Why does dynamic surface tension matter more than static?
On a fast-moving wet film there is very little time for surfactant to reach a newly created surface. Dynamic surface tension describes how fast it gets there, which is what decides whether a crater forms.
Which dispersant is APEO-free?
QK3730, which the data sheet declares free of APEO-class hazardous substances.
What pigment loading can a resin-free concentrate reach?
QK3755 is written for stable resin-free pastes at 30 to 60% pigment content.

Talk Through A Printing Inks And Overprint Varnish Formulation

Send the binder system, the pigment classes and the defect you are chasing. A grade shortlist with the matching data comes back by email.

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