If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Depth Profiling of a Photochemically Yellowed Paper. Part I: UV-Visible Reflectance and Fluorescence Spectroscopy

$29.00 plus tax (Refund Policy)

Buy Article:

Abstract:

A strongly photochemically yellowed paper having a reflectance at 457 nm of 53% (initial reflectance 73%) containing high-yield pulp from softwood was ground off to varying depths. The resulting papers were studied with the use of UV-visible diffuse reflectance and fluorescence spectroscopy. Yellowing penetration depth was determined and the chromophore distribution in the z direction was characterized with the aid of difference spectra. Expressed as the amount of chromophores based on the specific adsorption coefficient, 25% of the yellowing had occurred at a depth of 10-12 μm, 50% at 15-20 μm, and 75% at 25-30 μm. The fluorescence spectroscopy results showed that 50% of the changes induced by light had occurred at a depth of about 20 μm.

Keywords: Chromophore; Diffuse reflectance; Fluorescence; Light induced; Mechanical pulp; Paper; Spectroscopy; Surface analysis; Ultraviolet; Yellowing

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702953963283

Affiliations: 1: The Finnish Pulp and Paper Research Institute (KCL), Paper Science Centre, P.O. Box 70, FIN-02151, Espoo, Finland 2: Department of Chemistry, University of Helsinki, P.O. Box 19, FIN-00014, Helsinki, Finland

Publication date: January 1, 1995

More about this publication?
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more