So sánh phương pháp

	Độ cứng Janka	X-ray Densitometry
Lĩnh vực	Lâm nghiệp	Lâm nghiệp
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1934	2005
Người khởi xướng	Gabriel Janka	Gabriel Gazo
Loại	hardness test	measurement method
Công trình gốc	ASTM D1037-21. (2021). Standard test methods for evaluating properties of wood-base fiber and particle panel materials. ASTM International.	Hansmann, C., Wimmer, R., & Gindl, W. (2007). Assessing damage in wood-polymer composites by depth-sensing indentation. Composites Part A, 38(6), 1502–1508.
Tên gọi khác	wood hardness, resistance to indentation	wood density, radiography
Liên quan	3	3
Tóm tắt	The Janka hardness test measures wood resistance to indentation and denting by forcing a steel ball into the wood surface under standard load. Developed by Gabriel Janka in 1934, the test is a simple, nondestructive indicator of wood durability, wear resistance, and suitability for flooring, furniture, and other wear-prone applications. Janka hardness is one of the most widely used wood property metrics in wood science and commerce.	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.