For Students
Sensory characteristics include colour, lustre, odour, taste, texture, grain, figure, weight, and hardness of wood. These supplementary macroscopic characteristics are helpful in describing a piece of wood for identification or other purposes. Colour covers a wide range—yellow, green, red, brown, black, and nearly pure white woods exist, but most woods are shades of white and brown. Variations may show on a single piece of wood, depending on colour differences between heartwood, sapwood, earlywood, latewood, rays, and resin canals. Natural colour is subject to change by prolonged exposure to the atmosphere and by bleaching or dyeing. Some woods (for example, black ...(100 of 12879 words)