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Journal articles
Magazine articles
Industry Top 50 Power List, Paper360º July/August 2019
Industry Top 50 Power List, Paper360º July/August 2019
Journal articles
Magazine articles
Anheuser-Busch’s Angie Slaughter, Paper360º July/August 2019
Anheuser-Busch’s Angie Slaughter, Paper360º July/August 2019
Journal articles
Magazine articles
UPM CEO Jussi Pesonen Named European CEO of the Year, Paper360º March/April 2019
UPM CEO Jussi Pesonen Named European CEO of the Year, Paper360º March/April 2019
Journal articles
Magazine articles
Is Your Preventive Maintenance Program Right for Your Plant?, Paper360º March/April 2019
Is Your Preventive Maintenance Program Right for Your Plant?, Paper360º March/April 2019
Journal articles
Magazine articles
2019 TAPPI/PIMA Awards: Saluting Our Industry Leaders, Paper360 May/June 2019
2019 TAPPI/PIMA Awards: Saluting Our Industry Leaders, Paper360 May/June 2019
Journal articles
Magazine articles
Connecting People, Work Processes, and Technology to Improve R&M Management, Paper360 May/June 2019
Connecting People, Work Processes, and Technology to Improve R&M Management, Paper360 May/June 2019
Journal articles
Magazine articles
Meet the 2019 PPI Awards Winners, Paper360 May/June 2019
Meet the 2019 PPI Awards Winners, Paper360 May/June 2019
Journal articles
Magazine articles
Brad Southern is Reforming Louisiana Pacific, Paper360º November/December 2019
Brad Southern is Reforming Louisiana Pacific, Paper360º November/December 2019
Journal articles
Magazine articles
A Case for Planners, Paper360º November/December 2019
A Case for Planners, Paper360º November/December 2019
Journal articles
Magazine articles
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.