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Magazine articles
Open Access
Behavioral observation: gathering data for continuous safety improvement, TAPPI JOURNAL, February 1992, Vol. 75(2)

Behavioral observation: gathering data for continuous safety improvement, TAPPI JOURNAL, February 1992, Vol. 75(2)

Magazine articles
Open Access
Nonchlorine bleaching conference: the future is here, TAPPI JOURNAL, July 1992, Vol. 75(7)

Nonchlorine bleaching conference: the future is here, TAPPI JOURNAL, July 1992, Vol. 75(7)

Magazine articles
Open Access
Engineering analysis of recovery boiler superheater corrosion, TAPPI JOURNAL, June 1992, Vol. 75(6)

Engineering analysis of recovery boiler superheater corrosion, TAPPI JOURNAL, June 1992, Vol. 75(6)

Magazine articles
Open Access
ECF results please gruvon mill, TAPPI JOURNAL, January 1995, Vol. 78(1)

ECF results please gruvon mill, TAPPI JOURNAL, January 1995, Vol. 78(1)

Journal articles
Magazine articles
Open Access
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
Open Access
Creasing severity and reverse-side cracking, TAPPI Journal April 2020

ABSTRACT: Crease cracking can be detrimental to the functionality and appearance of paperboard-based packaging. The effect of creasing severity on the degree of reverse-side crease cracking (bead-side of the crease) of paperboard was investigated. Samples were creased with a range of rule and channel geometries, and the cracking degree was quantified as the percent of cracked length relative to the total length of the crease. The cracking degree was typically below 5% at low crease penetration depths, but was exponentially higher beyond a critical penetration depth. A rule and channel combination with a wider clearance shifted the critical depth to larger values. The creasing severity parameter, termed the creasing draw, converged the cracking degree data from different rule and channel combinations to a single curve. The creasing draw was derived from the same analytical expres-sions as the transverse shear strain and quantifies the length of paper that is drawn into the channel during creasing. The critical draw is defined as the draw at which cracking becomes greater than 5%, which corresponds with the point at which cracking becomes exponential. The critical draw is a material/system parameter that defines the level below which cracking is minimal.

Magazine articles
Open Access
The behavior-based approach to safety: a clear picture, an effective plan, TAPPI JOURNAL, August 1991, Vol. 74(8)

The behavior-based approach to safety: a clear picture, an effective plan, TAPPI JOURNAL, August 1991, Vol. 74(8)

Magazine articles
Open Access
Controlling anaerobic bacteria to improve product quality and mill safety, TAPPI JOURNAL, February 1991, Vol. 74(2)

Controlling anaerobic bacteria to improve product quality and mill safety, TAPPI JOURNAL, February 1991, Vol. 74(2)

Magazine articles
Open Access
Alkaline peroxide mechanical pulping of hardwoods, TAPPI JOURNAL, June 1991, Vol. 74(6)

Alkaline peroxide mechanical pulping of hardwoods, TAPPI JOURNAL, June 1991, Vol. 74(6)

Magazine articles
Open Access
Pump bearings: a new bearing system to improve reliability, TAPPI JOURNAL, March 1990, Vol. 73(3)

Pump bearings: a new bearing system to improve reliability, TAPPI JOURNAL, March 1990, Vol. 73(3)

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