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Introduction to Kraft Pulping and Bleaching Course
This introductory to intermediate-level course will help you expand your overall understanding of kraft pulp mill operations and broaden your awareness of how one part of the process affects other operations. With this knowledge, you'll be better equipped to troubleshoot quality problems and feel more confident in your interactions among process engineers and operators.
Webinars
Events
Towards Better Understanding of Void Volume in Press Nips Webinar
Papermaking Technology Operations Committee Webinar
TAPPI News
There is No Place Like Home
There is No Place Like Home Do you know where Sumter, South Carolina is located? Eric Fletty and I didn’t either. The genesis of our adventure began nearly three years ago from a conversation with
TAPPI News
Old Home Week
Old Home Week Above are 15 of the 21 in attendance who were not camera shy. It never ceases to amaze me, when TAPPI Members come together for a corporate visit or TAPPI conference with 100-5,000
TAPPI News
Paper Shows up in the Strangest Places—Who Says Our Industry Is Not Creative?
Paper Shows up in the Strangest Places—Who Says Our Industry Is Not Creative? What's in your hometown? I have adopted nine cities in my career in this industry, but my hometown was and remains to be
News
APPI plants trees to commemorate its 100th anniversary
To help celebrate its 100th anniversary in 2015, TAPPI, along with RockTenn, Valmet, TREES Atlanta, and members of the Dekalb County community, planted 100 trees in Decatur, Georgia.
News
TAPPI's southeast Ambassador's program identifies knowledge that pulp mills need
Earlier this year, TAPPI members and staff visited several pulp mills in the southeastern U.S., as part of the TAPPI Ambassador program.
News
Engineered Softwood Could Transform Pulp, Paper, Biofuel Industries
April 20, 2015. Scientists today demonstrated the potential for softwoods to process more easily into pulp and paper if engineered to incorporate a key feature of hardwoods.
Journal articles
Magazine articles
Application of ATR-IR measurements to predict the deinking efficiency of UV-cured inks, TAPPI Journal January 2022
ABSTRACT: In recent years, ultraviolet (UV)-curable ink has been developed and widely used in various printing applications. However, using UV-printed products (UV prints) in recovered paper recycling causes end-product dirt specks and quality issues. A new method was developed that can distinguish UV prints from other prints by means of attenuated total reflectance infrared (ATR-IR) spectroscopy. Application of this method could allow more efficient use of UV prints as raw materials for paper recycling.First, a mill trial was performed using UV prints alone as raw materials in a deinked pulp (DIP) process. Second, test prints were made with four types of UV inks: a conventional UV ink and three different highly-sensitive UV inks. Each print sample had four levels of four-color ink coverage patterns (100%, 75%, 50%, and 25%). Next, deinkability of all prints was evaluated by laboratory experiments. Finally, each print was measured using the ATR-IR method, and the relationship between the IR spectra and deinkability was investigated. Mill trial results showed that UV prints caused more than 20 times as many dirt specks as those printed with conventional oil-based ink. There were variations in recycling performance among UV prints taken from bales used for the mill trial. Lab tests clearly revealed that not all UV-printed products lead to dirt specks. In order to clarify the factors that affected deinkability of UV prints, the print samples were investigated by lab experiments. Key findings from lab experiments include: • The number of dirt specks larger than 250 µm in diameter increased as the ink coverage increased. • Higher ink coverage area showed stronger intensity of ATR-IR spectral bands associated with inks. These results indicate that deinkability of UV prints could be predicted by analysis of ATR-IR spectra. • Finally, the method was applied for assessment of recovered paper from commercial printing presses. It was confirmed that this method made it possible to distinguish easily deinkable UV prints from other UV prints. Based on these findings, we concluded that the ATR-IR method is applicable for inspection of incoming recovered paper.