A.  Hakam, M.  Ziani, M.  Rahouti, M.  Guelzim, K.  Iaych, N.El.  Imame, M.El.  Kortbi, M.  Hachmi, A.  Sesbou, M.El.  Matar, L.  Chrusciel, A.  Merli, 
    Effect of Artificial Aging at the Deterioration Wheel on the Color of
Finish Treated Woods of <em>Pinus sylvestris</em> and <em>Quercus robur</em>,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 22,
    2019,
    Pages 8261-8265,
    ISSN 1816-949x,
    jeasci.2019.8261.8265,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.8261.8265)
    Abstract: The durability of exterior wood finishes is not guaranteed with current finishing systems. Thus, the
objective of this study was to evaluate the color change of different finishes applied of wood of most
commercialized wood in Morocco, in order to find the best wood-finishing couple having the higher durability
in outdoor use. Accelerated aging wheel tests were carried out according to, the following principle: the
samples are successively exposed to ambient air, then immerged in water and exposed again to ambient air but
under UV radiations. A wheel spin is performed in 90 min and a complete cycle is performed in 3 weeks, so that,
a complete cycle counts 336 wheel revolutions. The samples tested on this aging wheel are woodblocks made
of two wood species: Scots pine (<i>Pinus sylvestris</i>) and Pedunculate oak (<i>Quercus robur</i>). These samples were
coated with four different finishes (two polyurethane finishes F<sub>1</sub> and F<sub>2</sub> and two acrylic finishes F<sub>3</sub> and F<sub>4</sub> ) and 
exposed to accelerated weathering for 12 weeks. Colorimetric measurements in color system CIELab: Gloss (L*),
green-red (a*) and blue-yellow (b*) coordinates, color saturation (C*) and tone angle (h*) were performed using
an X-Rite Model SP62 spectrophotometer before and after aging treatments. The results showed that rotating
wheel aging caused a decrease in the L* value and a change in the surface color of all the finishing pairs
studied. For wood/finishing couples including <i>Quercus robur</i> as a wooden support, the <i>Quercus robur</i>/ F<sub>3</sub> has
the best resistance to color change while for wood/finish with <i>Pinus sylvestris</i> as a wooden support, the Pinus
sylvestris/F<sub>5</sub> has the best resistance to color change.
    Keywords: Wood;finish;gloss;color;accelerated aging;rotating wheel