A printing process may involve providing a wood-based flat panel, which is made from a mass of wooden particles, a preliminary step of graphic composition of a multi-colored image using an electronic processor and relative software, and a printing step for printing the wood-based flat panel with the multi-colored image using an ink-jet printer provided with print heads. The colors employed by the ink-jet printer may include the prime colors cyan, magenta, and yellow in addition to black. The ink-jet printer may be controlled by the electronic processor. The wood-based flat panel may move relative to the ink-jet printer while at least one of the print heads propels ink micro-droplets onto the wood-based flat panel. The print heads may be stationary during the printing operation.