"**Huanghuali, red sandalwood, and red rosewood**" are considered the top three types of **redwood**, due to their high reputation, it's inevitable that they become highly sought after, hence the name includes "wood," such as "Huanghuali," "sour wood," and more. Still, many people want to know more about them. Let’s explore whether **African rosewood** is part of the redwood family. In the past few years, in the **mahogany furniture market**, many manufacturers have started selling furniture labeled as "**African sour**" (also known as "**non-acid**"). But is this **African rosewood** actually a type of redwood? Is it considered **rosewood** under the national standard for mahogany? What kind of wood is it really? According to the **redwood national standards**, there are **seven types of red rosewood** and **eight types of black rosewood**. If you can understand what "**non-acid**" refers to in terms of wood, then it becomes clearer whether the confusion around "**rosewood**" and "**non-rosewood**" in the national standard is resolved. Let’s take a closer look at **African non-acid wood** from multiple perspectives: Most of the **non-acid logs** currently imported into China come from **Mozambique in East Africa**. However, there are various opinions on what exactly "**non-acid**" refers to. Some say it’s **Kelly variegated beans**, others claim it’s **cola beans**, while some believe it’s **Berk Sumu**. There’s even a theory that "**non-acid**" isn’t a single species but a general term for **three types of wood**: **Kelly variegated beans**, **cola beans**, and **Berk Sumu**. These conclusions come from **authoritative sources**, including **quality inspection departments**, **customs authorities**, and **experienced timber experts**. Therefore, there is still no final conclusion on the exact identity of "**non-acid**". The information provided by these channels is only for reference. Now, let’s look at the **three main species** commonly referred to as "**non-acid**": 1. **Kelly variegated beans** (*Baphia kirkii*), belonging to the **Fabaceae** family. It is a tree reaching up to 20 meters tall with a trunk diameter of about 0.4 meters. The heartwood and sapwood are clearly differentiated, with the heartwood ranging from reddish-brown to dark brown, often featuring dark streaks. The growth rings are not obvious, and the wood has a fine texture with an oblique grain. Its air-dry density is approximately **0.9 g/cm³**. 2. **Cola bean wood** (*Cocophospermum mopane*), also from the **Fabaceae** family. This tree can grow up to 25 meters tall with a breast height diameter of up to 0.5 meters. The heartwood is yellow-brown with dark streaks, and the growth rings are not very distinct. The wood has a fine texture and is relatively soft. Its air-dry density is around **0.8 g/cm³**. 3. **Berk Sumu** (*Burkea africana*), part of the **Fabaceae** family. It is a medium to large tree, growing up to 20 meters tall with a trunk diameter of up to 0.6 meters. The heartwood is purple-red or reddish-brown, often with alternating light and dark stripes. The growth rings are slightly visible, and the wood has a medium-sized pore structure. Its air-dry density ranges from **0.81 to 0.90 g/cm³**. On the **mahogany furniture market**, many "**non-acid**" pieces are painted to resemble **red rosewood**. However, some are left unpainted, revealing their natural color, which ranges from **light yellow to dark yellow**. Due to issues like **white skin** and **low yield**, this type of wood requires higher-quality raw material selection. Although "**non-acid**" is not classified as **redwood** and does not meet the national standard for **rosewood**, it still has its own value. Compared to **red rosewood**, it may lack in quality, but in the broader category of **non-national standard mahogany**, it offers good **density and stability**. Additionally, since it's hard to source and has a low yield, it's challenging to process, which makes the finished furniture more expensive than **Siamese rosewood** (Thailand rosewood), though cheaper than **flowering branch** or **white branch** varieties. Moreover, although the **National Standard** and **General Technical Conditions for Mahogany Furniture** have been in place for years, the **labeling standards** in the market remain inconsistent, leading to consumer confusion. Many merchants give vague answers when asked about the wood type. Even recently, some well-known brands have labeled their "**non-acid**" furniture as "**African Red Rosewood**" or "**Full Redwood**", indicating that the **mahogany industry still has a long way to go** in terms of regulation and transparency.

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