The development of patina on ebony can vary significantly depending on several factors such as environmental conditions, the type of finish applied, and the frequency of use. Generally, it takes anywhere from a few months to several years for ebony to develop a noticeable patina. This process is gradual and involves the wood's surface reacting to the elements and the oils from the user's hands.

The reason for this extended timeline is rooted in the nature of ebony itself. Ebony is a dense and hard wood, which makes it less prone to immediate surface changes. The finish applied to the wood also plays a crucial role. For instance, a natural oil finish allows the wood to absorb oils from the user's hands, which then oxidize and create a rich, dark patina over time. Conversely, a lacquer or varnish finish can protect the wood but may slow down the patina development process.

Research conducted by the Woodwork Institute indicates that the patina on ebony can take anywhere from 6 months to 2 years to become noticeable. This timeline is influenced by factors such as the wood's initial finish, the climate in which the wood is stored and used, and the frequency of handling. In warmer, more humid climates, the patina may develop more quickly due to the increased rate of oxidation. Additionally, frequent handling can accelerate the process as the wood absorbs more oils from the user's hands.

In summary, the development of patina on ebony is a slow and natural process that can take several months to several years. This timeline is influenced by the wood's inherent properties, the type of finish applied, and environmental conditions.