Black walnut wool edge is milky white, heartwood from light brown to dark chocolate, the transition trace is not obvious, contrast is strong, rich sense of jump. The tangential surface has a beautiful big parabolic pattern, and other trees do not have a curve, with black gray strip or strip pattern, change thousands of changes, in the sun, there are golden silk blinking, pleasing to the eye.
Catalpa is an excellent substitute for black walnut. Black walnut and catalpa are trees belonging to Juglandaceae Juglans, but the terminology varies from region to region, just as japonica rice and indica rice are both rice. So how do we distinguish the two? The secret is texture.
1. there is dense brown hole on the annual ring of black walnut, but there is no dense brown hole on the ring line of Catalpa bungei.
2. Compared with catalpa, there are less Brown holes and more uniform distribution, and black walnut has more brown holes, which distribute along the annual line, and the closer to the annual line, the more.
3. Black walnut wood is dark in color, but its color is uneven, ranging from light yellow-brown to chestnut-brown, while catalpa sapwood has little difference in color.