Comparison of Color Parameters in Layers of Yacht Varnish, Waxy, and Stone Varnish Applied to Various Wood Species

In this study, solvent-based yacht varnish, stone varnish, and waxy were applied in two coats using a brush, following industrial application standards, to the surfaces of the following tree species: black alder (Alnus glutinosa L. Gaertn.), curupay [Anadenanthera macrocarpa (Benth.)], iatandza (Albizia ferruginea), lemon (Citrus limon (L.) Burm.), loquat (Eriobotrya japonica L.), magnolia (Magnolia grandiflora L.), plane (Platanus orientalis L.), sucupira (Bowdichia nitida Benth.), and hornbeam (Carpinus betulus L.). Subsequently, the color parameters (b*, C*, L*, a*, ho, ∆E*, ∆H*, ∆b*, ∆C*, ∆a*, and ∆L*) of the varnish layers obtained were compared with those of the untreated surfaces. According to the results, variance analyses have determined significant differences in all color parameters. Decreases in L* values and increases in a* values were observed across all wood types when treated with three different varnishes. Additionally, in plane, black alder, and hornbeam wood types, applying all varnishes resulted in increases in b* and C* values, while decreases were noted in ho values. In sucupira wood, however, decreases were observed in b*, C*, and ho values with the application of all three varnishes. It was observed that a single type of varnish yielded different results in different wood types. This finding was attributed to the use of different types of resins present in the varnish types used in the study, which resulted in varying outcomes.