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Journal articles
Characterization of printed offset ink layers on printing papers using fractal analysis, TAPPI JOURNAL May 2012
Characterization of printed offset ink layers on printing papers using fractal analysis, TAPPI JOURNAL May 2012
Journal articles
Optical and photocatalytic properties of photoactive paper with polycrystalline TiO2 nanopigment for optimal product design, TAPPI JOURNAL May 2012
Optical and photocatalytic properties of photoactive paper with polycrystalline TiO2 nanopigment for optimal product design, TAPPI JOURNAL May 2012
Journal articles
A method to produce paperboard with a lightweight low-density coating, TAPPI Journal November 2025
ABSTRACT: In this work, a method is described in which a coating layer is produced that consists of a network of bubble-shaped air-filled voids within the coating. This is accomplished by instantaneously flash-drying all the water in the coating as it exits the application nip. The nip is formed between a polished chrome drum and a deformable press roll. The combination of the drum temperature, nip pressure, and nip width allow for sufficient energy to be transferred to the coating to completely flash-dry the coating material. The pressure within the nip is sufficient to allow the coating to superheat within the nip, then flash boil as it exits the nip. This boiling effect and resulting expansion are constrained by the roll surface, resulting in a coated surface that mirrors the polished chrome surface. The coating immobilizes while in the process of boiling, which preserves the bubble structure. With a coat weight of 5 g/m2, a flat, smooth surface is produced. This process was scaled up to a mill production machine layout and run at speeds as high as 450 m/min.
Journal articles
Pre-damping effects on water absorption and drying dynamics in flexographic printing, TAPPI Journal November 2025
ABSTRACT: Optimizing flexographic printability can involve the ink and the substrate, as well as the printing process. It has been widely reported in the literature that controlling topography of the substrate and its porosity are vital for good flexographic printability, especially when using water-based inks. This study focuses on how pre-damping a surface impacts liquid absorption and improves wet trapping (ink on ink with no intermediate drying) in flexographic printing. A Prüfbau universal print tester was adapted to analyze flexographic wet-on-wet ink printing and trapping using yellow and magenta inks for contrast. Slow drying of the first ink layer (yellow) leads to mottle when the second layer (magenta) is applied. The study explores the “wet sponge” hypothesis: a pre-damped surface should absorb liquid faster. The Lucas- Washburn equation describes long-term absorption, but it does not capture short-term uptake, which instead follows a linear dependence on time.
Journal articles
Focusing on the future of controlling the process, TAPPI JOURNAL, March 1998, Vol. 81(3)
Focusing on the future of controlling the process, TAPPI JOURNAL, March 1998, Vol. 81(3)
Journal articles
A method for measuring ink-jet wicking using a document scanner and a personal computer, TAPPI JOURNAL, March 1998, Vol. 81(3)
A method for measuring ink-jet wicking using a document scanner and a personal computer, TAPPI JOURNAL, March 1998, Vol. 81(3)
Journal articles
Push-pull technology and corporate networks, TAPPI JOURNAL, March 1998, Vol. 81(3)
Push-pull technology and corporate networks, TAPPI JOURNAL, March 1998, Vol. 81(3)
Journal articles
Faster and smarter valve positioners, TAPPI JOURNAL, March 1998, Vol. 81(3)
Faster and smarter valve positioners, TAPPI JOURNAL, March 1998, Vol. 81(3)
Journal articles
Offshore engineering division, TAPPI JOURNAL, March 1998, Vol. 81(3)
Offshore engineering division, TAPPI JOURNAL, March 1998, Vol. 81(3)
Journal articles
TAPPI JOURNAL, May 1998, Vol. 81(5)Public Outreach - Spreading the Word About the Industry's Progress, TAPPI JOURNAL, May 1998, Vol. 81(5)
TAPPI JOURNAL, May 1998, Vol. 81(5)Public Outreach - Spreading the Word About the Industry's Progress, TAPPI JOURNAL, May 1998, Vol. 81(5)