Wood is a naturalMaterial, organic origin, which has a range of different properties. The quality characteristics of wood vary depending on its breed and different growth conditions.
In order to determine the breed of a tree, it is enough to carefully study a sample of this material.
The main features for determining the breedTree is the width of the sapwood, the presence of the nucleus, the various degrees of visibility of annual layers, the sharpness of the transition from the core to the sapwood, the size and the presence of the heart-shaped rays, the presence of resin motions, their number and dimensions, as well as the diameter of the vessels of the wood. Additional attributes include gloss, color, odor, texture, shape and number of knots.
In such ripening wood species as fir,Spruce, beech and aspen, the central part of the trunk differs markedly from the peripheral with the least moisture content, but it is practically impossible to distinguish it in color.
The width of annual rings depends on its mechanicalProperties, not just appearance. The best wood among coniferous trees is one with the most narrow layers. Pine with reddish wood and narrow annual layers is called among the masters of ore and is very much appreciated. A pine with broad rings is called myanda, but its strength is much lower than the previous one.
If you carefully look at the frontSection of deciduous trees, you will be able to distinguish dark or light points, these are the so-called vessels of a tree. In ash, oak and elm, the large vessels are arranged in three rows in the region of early wood, forming dark rings in each annual layer. That is why these types of trees are called ring-vascular. They have strong and heavy wood.
In aspen, birch and linden, the vessels are hardly distinguishable,Very small. These kinds of trees are called absent-minded. In apple, maple and birch wood is solid. And aspen, linden and alder - a soft structure.