השוואת שיטות

	צפיפות-רנטגן	התכווצות עץ
תחום	ייעור	ייעור
משפחה	Process / pipeline	Process / pipeline
שנת המקור	2005	1950
הוגה השיטה	Gabriel Gazo	Carl Skaar
סוג	measurement method	moisture response test
מקור מכונן	Hansmann, C., Wimmer, R., & Gindl, W. (2007). Assessing damage in wood-polymer composites by depth-sensing indentation. Composites Part A, 38(6), 1502–1508.	ASTM D143-19. (2019). Standard test methods for small clear specimens of timber. ASTM International.
כינויים	wood density, radiography	dimensional change, anisotropic shrinkage
קשורות	3	2
תקציר	X-ray densitometry is a nondestructive method for measuring wood density, microdensity profiles, and ring-by-ring density variation in wood samples using X-ray image analysis. The method uses attenuation of X-rays passing through wood to quantify mass per unit volume. It enables rapid assessment of wood quality without destroying material, making it valuable for research, timber grading, and genetic selection programs.	Wood shrinkage is the dimensional change that occurs as wood loses moisture from green (freshly felled) to oven-dry condition. Wood shrinks anisotropically: tangentially (along growth rings) more than radially (from center to edge), and both more than longitudinally (along the grain). Measuring shrinkage percentages is essential for understanding wood drying behavior, predicting checking and warping, and selecting materials for applications sensitive to dimensional change (flooring, cabinetry, musical instruments).