*2.1. Raw Material*

The raw material used in this study was wood coming from a dihybrid species of Paulownia (*Paulownia elongata x fortunei*), and was provided by Maderas Álvarez Oroza, S.L. located in Foz (Lugo, NW, Spain). The wood was milled in a Wiley mill until the size of a particle smaller than 8 mm, homogenized, and stored in containers with aeration in a cool, dry and dark place until its use.
