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A new technique for the measurement of show-through mottle of fine paper, TAPPI Journal September 2019
ABSTRACT: Mottling within print-through and show-through is caused by the variability of the local optical properties of the sheet. This mottling is visually disturbing and a mark of poor paper quality. The ability to predict print-through mottle of printed paper by measuring show-through mottle on the unprinted sheet would be a valuable asset for paper machine control.We examined the relationship between print-through mottle and show-through mottle. We worked with nine samples of 60 lb. uncoated fine paper (90 g/m2), from various North American paper companies, that were printed on an offset press, 400K (400% Black), on both sides. A show-through mottle instrumental determination technique was developed using an existing Fast Fourier Transform-based algorithm. The nine samples examined were ranked similarly by the visual evaluation of print-through mottle and by the instrumental determination of show-through mottle. We thus established that show-through on the unprinted sheet can be used as a reliable predictor of print-through, therefore saving time and money for papermakers. We also found a significant two-sidedness in show-through for some of the samples.
Journal articles
Magazine articles
Silicone Defoamers: Performance Booster or Risk?, Paper360º September/October 2019
Silicone Defoamers: Performance Booster or Risk?, Paper360º September/October 2019
Journal articles
Magazine articles
TAPPI Journal Summaries, Paper360º September/October 2019
TAPPI Journal Summaries, Paper360º September/October 2019
Journal articles
Magazine articles
TAPPI News, Paper360º September/October 2019
TAPPI News, Paper360º September/October 2019
Journal articles
Dynamic Modeling of a Paper Machine, Part II: Evaluation of Wet-End Model Dynamics, TAPPI JOURNAL, February 2007
Dynamic Modeling of a Paper Machine, Part II: Evaluation of Wet-End Model Dynamics, TAPPI JOURNAL, February 2007
Journal articles
Optimization of Rectangular Pulp Stock Mixing Chest Dimensions Using Dynamic Tests, TAPPI JOURNAL, February 2007
Optimization of Rectangular Pulp Stock Mixing Chest Dimensions Using Dynamic Tests, TAPPI JOURNAL, February 2007
Journal articles
Good Workers Can Improve Mill Competitiveness, Paper360º February 2007
Good Workers Can Improve Mill Competitiveness, Paper360º February 2007
Journal articles
A Modest Proposal for Skill Standards and Workforce Development, Paper360º February 2007
A Modest Proposal for Skill Standards and Workforce Development, Paper360º February 2007
Journal articles
Training: Special Delivery: Associations Offer Computer-based Training That Fits Industry Needs, Paper360º February 2007
Associations Offer Computer-based Training That Fits Industry Needs, Paper360º February 2007
Journal articles
Beginnings are Important, Paper360º February 2007
Beginnings are Important, Paper360º February 2007