Color Change of Ash, Oak, and Walnut Wood Through Heat Treatment

The objective of this study was to determine the total color change and mass loss that heat treatment with six different combinations of temperature and time induces in ash (Fraxinus excelsior L.), oak (Quercus robur L.) and walnut (Juglans regia L.) wood. As a result, a color palette was established for the three hardwood species, which are of interest for the furniture industry. Each color was associated with the obtained mass loss to present valuable information on how much the mechanical strength of the heat-treated material was affected. This study is of potential interest for furniture designers, as it promotes the color versatility of wood species without the addition of chemical substances.