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oai:bayburt-rdlopen.rawdatalibrary.net:bayburt/115622026-10-29T19:41:41Zopenairedrivercom_bayburt_10000col_bayburt_10001com_bayburt_10007col_bayburt_10220

The Effect of Weathering on Color and Glossiness Properties of Polyurethane-Modified Water-Based Varnish Layers Applied to Thermally Treated Ash WoodUlay, GökselAkter, MeteÇakıcıer, NevzatPeker, HüseyinAyata, ÜmitAtılgan, AbdiÇiftçi, SeymenArtificial weatheringAsh woodColorGlossinessWater based varnishThe effects of artificial weathering (168, 336, and 504 h) on the glossiness values and color parameters of varnished, polyurethane-modified ash wood were investigated. Samples included control samples without treatment and thermally treated samples under two different conditions (190 °C for 1.5 h and 212 °C for 2 h), all coated with a polyurethane-modified water-based varnish. In non-thermally treated and varnished samples, decreases in L* values were observed after weathering, while increases were noted in ho, C*, b*, and glossiness at 60° in both perpendicular and parallel directions to the fibers. After weathering, for samples thermally treated at 190 °C for 1.5 h and varnished, increases were observed in glossiness values at 20° and 60° in both directions, as well as in L*, b*, and ho values. Conversely, decreases were noted in a* and C* values. In samples thermally treated at 212 °C for 2 h and varnished, increases in a*, L*, ho, b*, and C* values were detected after weathering, whereas decreases were observed in glossiness at all angles (20° and 60°) in both directions. The ∆E* values showed a decreasing trend in non-thermally treated varnished samples after weathering, while an increase was observed in samples thermally treated at 212 °C for 2 h and varnished.North Carolina State University2025Articlehttps://rdlopen.rawdatalibrary.net/r/bayburt/11562https://doi.org/10.15376/biores.20.3.7555-75731930-2126enBioResourcesinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://bayburt-rdlopen.rawdatalibrary.net/tr/items/bayburt/11562