The bark may persist for many years. During this time, it will naturally dry out, so it should be specially prepared. Thin smooth plate preparation does not require them immediately you can use for the product. But the thicker the bark is rough, it has retained its natural appearance, and level it is not so easy. To get the story to work, it should be soaked for a few hours. Then remove from the water to wet a rag and put under the press until completely dry. You can make the bend in the opposite direction. Dried bark will seek again to adopt the original form itself is equalized.
It should be noted that the front can be both sides, and some masters believe face the opposite direction, accordingly, and prepare the material.