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The Impact of Sanding and Thermal Compression of Wood, Varnish Type and Artificial Aging in Indoor Conditions on the Varnished Surface Color

cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.author-orcid0000-0002-2060-0295
cris.virtual.author-orcid0000-0002-3800-8089
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcidba3d37ef-69d5-4dee-9704-c49b1a0a0cd8
cris.virtualsource.author-orcida9b408fd-bf11-40cc-b4af-169425015799
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.abstract.enThe aim of this pioneering study was to compare and evaluate two different pre-treatment processes of wooden surfaces prior to varnishing by sanding or thermal compression in terms of the impact on the color characteristics of the varnished surface. In the experiment, a wood veneer of black alder and birch before varnishing was subjected to sanding with a sandpaper of 180 grit size, or thermal compression at temperatures of 180 and 210 °C. Three different kinds of commercially manufactured transparent varnish (water-based (WB) varnish, polyurethane (PUR) varnish and UV-cured (UV) varnish) were applied to the prepared veneer surfaces. The samples prepared in this way were also subjected to an artificial aging process in indoor conditions by ultraviolet light and infrared irradiation (UVL + IR). The colors of the surfaces in the CIE L*a*b* system were measured and color differences (ΔL*, Δa*, Δb* and ΔE) were determined for sanded and thermally densified, unvarnished and varnished, as well as subjected to accelerated aging surfaces. It was found that thermally densified surface-varnished veneer is more resistant to color changes during artificial aging compared to when sanded and surface-varnished. The transparent varnish systems showed better photo-stability, when thermally densified wood veneer was used as substrate than that of sanded wood. The WB varnish showed the greatest resistance to discoloration during UVL + IR irradiation, followed by PUR and UV. The preliminary findings obtained in this study indicated that replacing the sanding process with thermal compression of wood surface before varnishing could be considered as an alternative method of producing varnished panels with satisfactory color properties of surface.
dc.affiliationWydział Leśny i Technologii Drewna
dc.affiliation.instituteKatedra Nauki o Drewnie i Techniki Cieplnej
dc.contributor.authorBekhta, Pavlo
dc.contributor.authorKrystofiak, Tomasz
dc.contributor.authorLis, Barbara Teresa
dc.contributor.authorBekhta, Nataliya
dc.date.access2026-02-16
dc.date.accessioned2026-03-02T12:39:56Z
dc.date.available2026-03-02T12:39:56Z
dc.date.copyright2022-02-12
dc.date.issued2022
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if2,9
dc.description.number2
dc.description.points100
dc.description.versionfinal_published
dc.description.volume13
dc.identifier.doi10.3390/f13020300
dc.identifier.issn1999-4907
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/7559
dc.identifier.weblinkhttps://www.mdpi.com/1999-4907/13/2/300
dc.languageen
dc.relation.ispartofForests
dc.relation.pagesart. 300
dc.rightsCC-BY
dc.sciencecloudnosend
dc.share.typeOPEN_JOURNAL
dc.subject.enblack alder
dc.subject.enbirch
dc.subject.encolor
dc.subject.envarnish system
dc.subject.ensurface pre-treatment
dc.subject.ensanding
dc.subject.enthermal compression
dc.subject.enartificial aging
dc.titleThe Impact of Sanding and Thermal Compression of Wood, Varnish Type and Artificial Aging in Indoor Conditions on the Varnished Surface Color
dc.title.volumeSpecial Issue Performance and Modification of Wood and Wood-Based Materials
dc.typeJournalArticle
dspace.entity.typePublication