Investigation of the Effects of Some Varnish Types Used in the Furniture Industry on Woodworking Performance of Laser

In recent years, laser wood processing method has become quite common. On the other hand, in order to ensure the persistence of the wooden material, its upper surfaces must be covered with. In this study, the effects of the caused by the laser beam on the most preferred varnish types of the wood surface treatment, by the CNC laser wood processing technology were investigated. Beech wood test specimens were coated with cellulosic varnish, synthetic varnish, polyurethane varnish and acrylic varnish and their layer thickness was also measured. Based to the data obtained, it was evaluated the effects of various varnish layers on the kerf depth and upper kerf width in laser cutting compared to the control sample without varnish. In addition, the effects of varnish layers on laser wood engraving were investigated. As a result, it was concluded that some varnishes weakened the laser cutting performance of the control samples, while some varnishes increased it. In addition, all varnish types have a positive effect on laser cutting performance by reducing the upper kerf width of the laser cutting notch. In wood engraving with laser, all varnish types have weakened the laser engraving performance.