ORIGINAL PAPER
Analysis of the impact of blue stain on the color, glossiness, and whiteness properties of scots pine lumber
 
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1
Bayburt University, Faculty of Arts and Design, Department of Interior Architecture and Environmental Design, Bayburt, Turkey., Turkey
 
2
Artvin Çoruh University, Department of Forest Industrial Engineering, Turkey
 
3
Van Yuzuncu Yil University, Van Vocational School, Department of Furniture and Decoration, Van, Turkey, Turkey
 
4
Kirikkale University, Department of Interior Design, Kirikkale, Türkiye, Turkey
 
5
Department of Materials Processing Technology, Afyon Kocatepe University, 03200, Afyonkarahisar, Turkey, Turkey
 
These authors had equal contribution to this work
 
 
Submission date: 2025-05-12
 
 
Final revision date: 2025-07-10
 
 
Acceptance date: 2025-07-15
 
 
Online publication date: 2026-04-22
 
 
Corresponding author
Ümit Ayata   

Bayburt University, Faculty of Arts and Design, Department of Interior Architecture and Environmental Design, Bayburt, Turkey., Bayburt University, Faculty of Arts and Design, Department of Interior Architecture and Environmental Design, Bayburt, Turkey., Bayburt Üniversitesi, Sanat ve Tasarım Fakültesi, , 69000, bayburt, Turkey
 
 
 
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ABSTRACT
Blue stain causes bluish to purplish discoloration in Scots pine wood, reducing its aesthetic value. It is generally caused by saprophytic fungi that colonize the wood surface; while it does not affect structural strength, it leads to a loss in commercial value. Moreover, this condition can impact export quality and limit the potential applications of the wood. Blue stain negatively affects the production process by complicating the drying phase, while its visual defects reduce customer perception, and the chemical treatments required to prevent or remove the staining increase production costs. This study investigates the changes in color parameters, glossiness values, and whiteness index of Scots pine (Pinus sylvestris L.) wood with blue rot compared to normal yellow pine wood. The study compares color parameters such as lightness (L*), red (a*), yellow (b*), chroma (C*), and hue angle (ho), as well as glossiness measurements at 20°, 60°, and 85° angles, and whiteness index (WI*) values. Significant changes in color parameters were observed in the wood with blue rot. The L* value decreased by 11.43%, the a* value decreased by 79.95%, and the b* value decreased by 28.86%. The C* value decreased by 32.75%, while the ho increased by 17.74%. These results indicate that the wood with blue rot has a darker, greener, and more matte appearance. In the glossiness tests, the glossiness value of the wood with blue rot showed a slight decrease at the 20° angle compared to the normal test sample.
eISSN:2956-9141
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