Wood Products Online Expo Vision Scan - Decay X Bark Pocket X  Ring Shake X  Heart Stain X  Blue Stain X  Decay X  Birdseye X  Compression Wood X  Pith X  Wane X  Lumber Characteristics - Natural Defects:
 Bark Pocket Opening between annual growth rings containing bark and/or pitch.  Ring Shake Lumber Characteristics A lengthwise separation of wood which occurs between the growth rings to partially or fully encircle the pith. Other types of shake include: heart shake, through shake and surface shake.  Heart Stain A variation from the natural color that may range from pink to brown. Usually occurs in irregular patches.  Blue Stain A variation from the natural color of the sapwood. It does not affect the strength of the piece but can affect the piece where visual characteristics are considered.  Decay Is the disintegration of the wood due to the action of a fungus. Also known as Unsound Wood. Early stages of decay are known as Incipient Decay, where the wood is slightly discolored but the wood hardness has not been perceptibly changed.  Birdseye BA disturbance in the normal grain pattern that usually resemble "eye" like shapes. Very little is known about how or why these defects form. There can be a wide variation in defect appearance between different tree species but they are often placed (or misplaced) in the category of birdseye.  Compression Wood Abnormal wood that forms on the underside of a leaning or cooked tree. The wood is hard and brittle with a very distinguishing color.  Pith A small cylinder of primary tissue at the center of the tree around which the annual rings form.  Wane Bark or lack of wood on the edge or corners of the piece. | ||
