Each type of wood has its own characteristics based on density, grain structure, resin saturation and natural color. When engraving or cutting wood, a thin lacquer finish is preferable since it protects the un-engraved areas from smoke discoloration. Any discoloration can be easily wiped from the surface with a wet rag. If the wood is not finished, then smoke permeates the grain and is very difficult to clean. Sanding the surface is an option for cleaning unfinished woods.
Wood is very forgiving when laser engraved.
Due to its porous nature, extreme detail is difficult to achieve. When cutting completely through wood, pulse spacing and the ability to precisely control the spacing is critical. Wood responds well to ppi settings of 200 - 300 which reduces charring of the edge. Typically, the thinner the wood, the less discoloration will occur when cutting. Paper products typically do not engrave as well as solid woods, although pressboard is an exception.