Achieving a natural black finish on a teak root console table without the use of chemicals found in typical timber stains can be accomplished through various methods, such as:

1. Charcoal or Carbonization: This technique involves burning the surface of the wood to create a blackened effect. The process involves controlled burning to carbonize the outer layer of the wood, resulting in a deep black color. After carbonization, the surface can be sanded and sealed to preserve the finish.
2. Heat Treatment: Heat treatment involves exposing the wood to high temperatures in a controlled environment. This process alters the chemical and physical properties of the wood, resulting in a darker color. Heat treatment can be combined with other techniques such as oiling or waxing to enhance the finish and protect the wood.
3. Natural Oils and Waxes: Certain natural oils and waxes, such as linseed oil or beeswax, can be used to darken the wood naturally. These substances penetrate the wood fibers, enriching the color and providing protection against moisture and wear.
4. Ageing: Allowing the teak root to naturally age and weather over time can also result in a darker patina. Exposure to sunlight, air, and moisture gradually darkens the wood, enhancing its natural beauty.

By utilizing one or a combination of these methods, it’s possible to achieve a natural black finish on a teak root console table without resorting to chemicals commonly found in traditional timber stains. This approach not only preserves the organic integrity of the wood but also ensures a more environmentally friendly and sustainable finishing process.