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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
George Mead Focuses on Consolidated Papers' Future, TAPPI JOURNAL, October 1998, Vol.81(10)

George mead focuses on consolidated papers' future, TAPPI JOURNAL, October 1998, Vol.81(10)

Journal articles
Open Access
Shop talk - measuring the gap: Roll structure analysis, TAPPI JOURNAL, October 1998, Vol.81(10)

Shop talk - measuring the gap: roll structure analysis, TAPPI JOURNAL, October 1998, Vol.81(10)

Journal articles
Open Access
Shop talk - metering size press drying and web-handling systems, TAPPI JOURNAL, October 1998, Vol.81(10)

Shop talk - metering size press drying and web-handling systems, TAPPI JOURNAL, October 1998, Vol.81(10)

Journal articles
Open Access
Critical thinking in a production setting, TAPPI JOURNAL, October 1998, Vol.81(10)

Critical thinking in a production setting, TAPPI JOURNAL, October 1998, Vol.81(10)

Journal articles
Open Access
Steam turbine risk assessment project: inspection and overhaul optimization of steam turbines, TAPPI JOURNAL, September 1998, Vol. 81(9)

Steam turbine risk assessment project: inspection and overhaul optimization of steam turbines, TAPPI JOURNAL, September 1998, Vol. 81(9)

Journal articles
Open Access
Environmental progress at Howe Sound Pulp & Paper, TAPPI JOURNAL, September 1998, Vol. 81(9)

Environmental progress at howe sound pulp & paper, TAPPI JOURNAL, September 1998, Vol. 81(9)

Journal articles
Open Access
Creating value in the mature paper industry, TAPPI JOURNAL, September 1998, Vol. 81(9)

Creating value in the mature paper industry, TAPPI JOURNAL, September 1998, Vol. 81(9)

Journal articles
Open Access
Cleaning and conditioning paper machine clothing for recycled fiber use, TAPPI JOURNAL, April 1999, Vol. 82(4)

Cleaning and conditioning paper machine clothing for recycled fiber use, TAPPI JOURNAL, April 1999, Vol. 82(4)

Journal articles
Open Access
Design and installation of a rplacement thermal oxidizer for odor abatement, TAPPI JOURNAL, April 1999, Vol. 82(4)

Design and installation of a rplacement thermal oxidizer for odor abatement, TAPPI JOURNAL, April 1999, Vol. 82(4)

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