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Journal articles
Magazine articles
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
The link between the molecular and structural theories of paper elasticity, TAPPI JOURNAL, April 1997, Vol. 80(4)

The link between the molecular and structural theories of paper elasticity, TAPPI JOURNAL, April 1997, Vol. 80(4)

Journal articles
Open Access
The role of print layer thickness and cohesiveness on deinking of toner-printed papers, TAPPI JOURNAL, April 1997, Vol. 80(4)

The role of print layer thickness and cohesiveness on deinking of toner-printed papers, TAPPI JOURNAL, April 1997, Vol. 80(4)

Journal articles
Open Access
Seven papermaking pioneers inducted into paper industry hall of fame, TAPPI JOURNAL, April 1997, Vol. 80(4)

Seven papermaking pioneers inducted into paper industry hall of fame, TAPPI JOURNAL, April 1997, Vol. 80(4)

Journal articles
Open Access
A preliminary study of kenaf fiber bundles and their composite cells, TAPPI JOURNAL, August 1997, Vol. 80(8)

A preliminary study of kenaf fiber bundles and their composite cells, TAPPI JOURNAL, August 1997, Vol. 80(8)

Magazine articles
Open Access
Technology affecting the bottom line was the focus for the tappi/isa-pupid pcE&i conference, TAPPI JOURNAL, August 1997, Vol. 80(8)

Technology affecting the bottom line was the focus for the tappi/isa-pupid pcE&i conference, TAPPI JOURNAL, August 1997, Vol. 80(8)

Journal articles
Open Access
Process control and instrumentation staffing needs: a survey of north american mills, TAPPI JOURNAL, August 1997, Vol. 80(8)

Process control and instrumentation staffing needs: a survey of north american mills, TAPPI JOURNAL, August 1997, Vol. 80(8)

Journal articles
Open Access
Control valves - the key component in managing process variability, TAPPI JOURNAL, August 1997, Vol. 80(8)

Control valves - the key component in managing process variability, TAPPI JOURNAL, August 1997, Vol. 80(8)

Journal articles
Open Access
The pulp and paper industry in India, TAPPI JOURNAL, August 1997, Vol. 80(8)

The pulp and paper industry in india, TAPPI JOURNAL, August 1997, Vol. 80(8)

Journal articles
Open Access
Old giants rearm in northern India, TAPPI JOURNAL, August 1997, Vol. 80(8)

Old giants rearm in northern india, TAPPI JOURNAL, August 1997, Vol. 80(8)

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