Research of certain aspects of improving the color resistance of thermomodified wood

It is proved that the color of wood tends to darken due to changes in the chemical components of wood, such as the degradation of amorphous carbohydrates during heat treatment at high temperatures. The application of heat treatment significantly changed the values of color parameters L*, a*, b* in samples of thermomodified wood. The parameter L* on the end and formation surfaces was significantly higher (72 for the end surface and 80 for the formation) in the control samples. As a result of heat treatment, the value of L* decreased significantly at a temperature of 160 °C, the duration of treatment was 10 hours to 44 and 47 respectively. The influence of different types of protective substances on the surface color of heat-treated wood is determined. The application of oil-wax and azure on the surface of the samples also affected the darkening of their color. We can say that heat-treated samples, the structure of which has changed compared to ordinary wood, show different interactions with the applied materials. The influence of the protective substance on the value of ΔL* depending on the treated surface is revealed.