In addition to the valuable materials, mahogany furniture is often the most appealing aspect for collectors due to its elegant design and craftsmanship. According to the current "Redwood" standard (GB/T 18107-2000), redwood is categorized into five genera, eight classes, and 33 species. Among them, rosewood, black rosewood, huanghuali, sandalwood, and wenge are the most commonly found varieties.
When purchasing mahogany furniture, how can one tell the difference between various types of wood based on their texture?
Huanghuali Wood Has a Clear Grain and a Fragrant Scent
Known as "old pear" in traditional terms, huanghuali refers specifically to Hainan huanghuali, which belongs to the genus Dalbergia, part of the Dipterocarpaceae family. Locally, it's called "fragrant branch." Its color ranges from light yellow to purple-red, with a bright appearance and distinct grain. It also has a subtle fragrance.
Because of its natural beauty, huanghuali is typically used in furniture without carving. However, many products labeled as "Huanghuali" today are actually Vietnamese rosewood, Laohua pear, Burmese rosewood, or Cambodian rosewood. These have similar colors and textures but are not as vibrant as genuine Hainan huanghuali.
Rosewood Features Twisted Silk-like Grain
Traditionally, redwood is divided into old and new types, with "old" being more prized. It's said that "old redwood is purple, while new redwood is red." In reality, the reddish ones are mostly black rosewood, and the old type is traditionally known as cowhair rosewood.
The color of rosewood tends to darken over time, turning from red to deep purple or even black. Its annual rings often appear in twisted patterns, sometimes resembling crab claws or cow hair. While some pieces may have straight grains, the fine ones always show a twist. Rosewood is dense and heavy, and when crafted into furniture, it’s usually left uncarved to highlight its natural beauty.
Differences in Value Between New and Old Rosewood
Rosewood comes in a variety of colors and has a clear, beautiful grain. It’s also divided into new and old types. New rosewood refers to various types of "grass pear," with a red tone. It’s mainly produced in Southeast Asia and southern China, including Guangdong and Guangxi. These are all classified under the "red genus." However, the Red Bean genus is no longer considered part of the official "five genera." When buying rosewood, it's essential to check the certification.
Rosewood Has a Sour Smell
There are several types of rosewood, all belonging to the genus Dalbergia. They are generally divided into three categories: black rosewood, red rosewood, and white rosewood. A common characteristic of these woods is that they emit a faint vinegar-like scent during processing, hence the name "sour wood."
Among these, black rosewood is considered the highest quality, with a color ranging from deep purple to dark purple, hard wood, and a smooth finish. Some pieces are nearly indistinguishable from rosewood. Red rosewood has a more visible grain, with straight patterns and a jujube-red color. White rosewood is lighter in color, closer to grass pear, and less rich in tone.
Chicken Wing Wood Has a Pattern Like Chicken Wings
Wenge wood comes from the genus Arachis and Trichoderma, and it's widely distributed. It can be roughly divided into three types: African yamu wood, white flower yamu wood, and iron wood. The "chicken wing" pattern is one of its most distinctive features.
Once known as "Hainan Wenmu," chicken wing wood has a mix of black and white tones, with yellow to purple hues. When cut at an angle, it reveals intricate cloud-like patterns. In addition to its fine texture, it also displays purple and brown streaks that resemble crab claws. On the longitudinal section, the grain appears delicate and natural, forming patterns that look like characters or landscapes.
By Zhang Wei, Southern Daily Reporter
Solar road studs, also known as solar road markers, are small devices embedded in the road surface that use solar energy to light up. They are typically made of durable materials such as polycarbonate and are designed to enhance road visibility, especially during night-time and adverse weather conditions.
Key Features
- Solar Panels: Solar road studs are equipped with solar panels that capture sunlight and convert it into electricity.
- LED Lights: The electricity is used to power LED lights, which provide illumination to mark the road edges or lanes.
- Battery Storage: Excess energy is stored in rechargeable batteries, ensuring the studs remain lit even when sunlight is not available.
Benefits
- Improved Safety: Solar road studs significantly improve road safety by providing clear and visible markings, reducing the risk of accidents.
- Environmentally Friendly: They use renewable solar energy, reducing reliance on fossil fuels and lowering carbon emissions.
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In summary, solar road studs offer an innovative and sustainable solution for enhancing road visibility and safety, making them a valuable addition to modern road infrastructure.
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