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Boxed Heart: This term is applied to the timber, which is sawn in a way that the pith or the center heart falls entirely within the surface throughout its length.
Machine Burnt: Overheating is the main reason for this defect.
Machine Notches: defective holding and pulling causes this defect.
Miscut: erroneous cutting or sawing of wood causes this defect. Lack of experience in sawing and carelessness is the main reason for erroneous cutting.
Imperfect Grain: Mismatch in grain alignment.
Defects due to conversion:
These marks appear as small, shallow indentations on the surface of the timber. They are most common on the rough-sawn faces of the timber and can be a result of improper sawing technique or dull saw blades.