NUMBER OF LASER BEAM PASSES INFLUENCE ON SURFACE COLOR TO WOOD MARKING

For burning wood surface with laser beam darkening of the surface is obtained by burning.Traditional wood burning is done by burning it with a hot metal. Pirogravure with traditional means of wood is widely used in some cases the result is appreciated as a work of art. Studies on the use of laser for pyrography of wood are few in number by comparison with laser applications for cutting materials, including wood. By successive passes is being pursued getting dark colors.A maple wood surface was irradiated by successive passes of laser beam. Colorimetric measurements for the color obtained were performed. These were correlated with the number of passes. A physical and technological investigation of the machining process was carried out.By setting an optimal number of passes, the processing time is reduced.