Duan Mu is a type of purple sand clay, known for its unique properties in making teapots. When crafted into a teapot, it's referred to as a "section clay teapot." This kind of clay can be broadly categorized into three types: original section clay, aged section clay, and blended section clay. Aged section clay refers to the original ore that has been left to mature over time, developing deeper characteristics.
In the golden section, there's also what's called the "sesame section," which is a mix of purple sand particles blended into the green clay of the same region. This technique enhances the visual texture of the clay. In recent years, many tea enthusiasts have grown fond of this style. The key lies in how well the blending effect is executed—not just about personal taste, but about the overall quality and craftsmanship.
Compared to other teapots, the segment clay teapot stands out due to its refined qualities. High-quality segment clay teapots have a subtle presence of purple sand particles, giving the appearance that only the color changes within the green clay of the mountain. The layers are smooth, resembling jade. Duan Mu does not allow the green color of the mountain to fade; instead, it maintains a pure, bright yellow tone. It is widely used in the pottery industry, and when fired, the purple sand from Duan Mu can produce various effects—both in color and texture.
Understanding the characteristics of a segment clay teapot helps in identifying its authenticity. First, observe the color: genuine purple sand should exhibit a jade-like luster, whether it's purple, yellow, red, or a blend of these colors. The light quality should appear soft, almost oily, and even after rubbing, it should not feel waxy or polished. It should resemble the natural sheen of old jade, where rarer materials are more valuable due to limited resources.
Second, listen to the sound. A good teapot produces a soft, earthy tone when tapped, not sharp like metal or porcelain. A hoarse sound suggests good air permeability and a non-crystallized interior, which helps preserve the tea’s aroma without altering it.
Third, feel the texture. The surface should be smooth and rounded, comfortable to the touch. While there may be visible particles, they should be evenly distributed and soft to the touch. The purple sand particles are typically around 32-60 mesh, and traditional hand-processing gives a different feel compared to machine-processed powders.
Lastly, consider the aging effect. With proper use and dry rubbing over time, the teapot will develop a matte, oily finish. The longer it's used, the deeper the color becomes, eventually revealing the pot’s “aura†and personality.
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