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Influence of surface-inducled nonuniform reflectance on the diffuse reflectance factor. Part II: Experimental verification on coated substrates
KTH, Superseded Departments, Production Engineering.ORCID iD: 0000-0002-0105-4102
2003 (English)In: Journal of Pulp and Paper Science (JPPS), ISSN 0826-6220, Vol. 29, no 8, 254-259 p.Article in journal (Refereed) Published
Abstract [en]

Many authors have found that the Kubelka-Munk (KM) scattering coefficient, s(c), of a coating applied to a substrate decreases with increasing coat weight. This decrease is usually explained by a structural/porosity change with coating thickness or a penetration of the coating into the paper In this paper we propose an alternative explanation to the observed decrease in sc, namely the misinterpreted diffuse reflectance factors for non-Lambertian reflecting substrates and coatings. This explanation was recently proposed by the authors; the second part presented here provides experimental support for the presence of a nonuniform reflectance distribution and its influence on KM fitted data. Three different coated systems are considered, using a transparent film, abase paper and a synteape film as substrate. The effect of the surface reflectance of the substrate and of the coated substrate can explain the apparent decrease in sc as an artifact when measuring a sample with an instrument having a d/0degrees geometry.

Place, publisher, year, edition, pages
2003. Vol. 29, no 8, 254-259 p.
Keyword [en]
paper, coatings
Identifiers
URN: urn:nbn:se:kth:diva-22818ISI: 000185356100002OAI: oai:DiVA.org:kth-22818DiVA: diva2:341516
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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