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Open Access
Surface energy considerations for offset printing of coated paper and paperboard, TAPPI Journal November 2023

ABSTRACT: Offset printing of coated paper involves the complex interactions of ink with a surface that is characterized by three major properties: roughness, porosity, and related pore network structure and surface chemistry (related to surface free energy [SFE]). The effects of porosity and roughness are relatively well understood and are documented in the literature, whereas the influence of surface chemistry is much less studied and therefore the focus of this paper. The key results shown include: i) Coating porosity has a negligible effect on SFE determination by contact angle using two fluids. ii) The chemistry of the latex polymer in the coating formulation dominates the influence on SFE compared to pigment, with any surface energy differences present in the pigment being almost completely masked by latex. iii) Wetting agent and corona treatment can impact water absorption rate and surface spreading of water, resulting in small differences in printability. Increasing the concentration of the surfactant on a coated surface indicates switching orientation of the surfactant molecules, giving a “step wise” printing result. When looking to improve offset printability by selection of different pigments, the variation in SFE is less important than variation in either surface roughness or porosity.

Journal articles
Open Access
Are salt-laden recovery boilers a significant source of dioxins?, TAPPI JOURNAL, February 1997, Vol. 80(2)

Are salt-laden recovery boilers a significant source of dioxins?, TAPPI JOURNAL, February 1997, Vol. 80(2)

Journal articles
Open Access
Dynamics of white water networks during web breaks, TAPPI JOURNAL, December 1997, Vol. 80(12)

Dynamics of white water networks during web breaks, TAPPI JOURNAL, December 1997, Vol. 80(12)

Journal articles
Open Access
A dynamic model of the interaction between the chemical reac

A dynamic model of the interaction between the chemical reactions and the residence time in a continuous digester, TAPPI JOURNAL, April 1996, Vol. 79(4)

Journal articles
Open Access
Model-based control of high-consistency refining, TAPPI JOURNAL, October 1996, Vol. 79(10)

Model-based control of high-consistency refining, TAPPI JOURNAL, October 1996, Vol. 79(10)

Journal articles
Open Access
Print-registration control in a rotogravure printing press combined with extrusion-coating or lamination processes, TAPPI JOURNAL, March 1995, Vol. 78(3)

Print-registration control in a rotogravure printing press combined with extrusion-coating or lamination processes, TAPPI JOURNAL, March 1995, Vol. 78(3)

Journal articles
Open Access
An experimental study of contact coefficients in paper drying, TAPPI JOURNAL, May 1994, Vol. 77(5)

An experimental study of contact coefficients in paper drying, TAPPI JOURNAL, May 1994, Vol. 77(5)

Journal articles
Open Access
Forces on fibers in low-consistency refining, TAPPI JOURNAL,

Forces on fibers in low-consistency refining, TAPPI JOURNAL, December 1994, Vol. 77(12)

Journal articles
Open Access
Success without alienation, TAPPI JOURNAL, October 1993, Vol

Success without alienation, TAPPI JOURNAL, October 1993, Vol. 76(10)

Journal articles
Open Access
Upgraded recovery boiler meets low air emissions standards, TAPPI JOURNAL, December 1994, Vol. 77(12)

Upgraded recovery boiler meets low air emissions standards, TAPPI JOURNAL, December 1994, Vol. 77(12)

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