![]() ![]() Diffuse porous woods with small pores tend to be the most evenly textured. ![]() Because of the size and distribution of the pores (particularly within the earlywood zone), wood can be very uneven textured. Some will still feel somewhat soft and rough (what is described as coarse texture), while others will feel very smooth and glassy (referred to as a f ine texture).Īlso related to the texture itself is the uniformity of the texture. Given an equal amount of sanding and smoothing operations, different woods will feel smoother than others. Texture: In the most basic terms, the wood texture describes how a wood feels. This particular grain pattern is sometimes called “feather crotch.” This crotch section of Black Walnut (Juglans nigra) has irregular grain, which presents difficulty in terms machining and stability. Irregular grain can be due to a number of factors, such as knots, burls, large branches separating from the trunk (called “crotch” wood). Irregular: This is a more ambiguous catch-all term that describes wood grain that swirls or twists in an abnormal way.This pattern is most clearly seen in flatsawn sections of wood. Wavy: Just as the name implies, this grain pattern indicates when the grain of the wood grows in a wavy fashion.This sample of Narra (Pterocarpus indicus) shows a clear ribbon stripe figure, which is formed by interlocking grain spiraling in different directions throughout the tree’s trunk. Both spiral and interlocked grain can present challenges when machining, and may result in tearout. This change in grain direction can be seen the clearest on quartersawn surfaces, which creates a ribbon stripe figure. Depending on the slant of the spiral, and the frequency of the direction changes, woods can be either shallowly or strongly interlocked. Interlocked: Taking spiral grain a step further, interlocked grain occurs when spiral-grained trees change directions, and spiral back and forth throughout the trunk, alternating between right-hand and left-hand spirals.Spiral: Some tree species grow with the grain at a slight incline, with a spiral-like pattern circling the trunk.Straight-grained woods are generally easiest to work and machine with minimal complications. Straight: As the name suggests, this denotes species which grow straight and parallel with the tree’s trunk.Grain direction usually can’t be detected from endgrain examination it may have an effect on the workability or appearance of the wood. Grain Direction: A tree species can grow in a number of grain directions. In addition to the actual color and appearance of the wood, there are also more subtle and/or tactile properties of the wood.
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