Agarwood, known for its rich resinous aroma and cultural significance, undergoes a natural transformation over time, both in fragrance and appearance. One of the most talked-about changes is the development of patina, or 包浆: a natural surface sheen acquired through oxidation and tactile interaction. While some connoisseurs regard this transformation as a mark of refinement, others view it as a hindrance to the wood’s aromatic expression.

Scientifically speaking, the formation of patina can be attributed to two main processes:
1. Oxidative aging – Continuous exposure to air initiates a slow chemical reaction, forming an oxidised layer on the agarwood's surface.

2. Physical interaction – Repeated wearing or handling introduces moisture, skin oils, and heat, which gradually seal the surface with a subtle, glossy layer in combination with environmental humidity and temperature.

Before patina sets in, the fragrance of agarwood is typically more potent and volatile. Once the patina develops, however, the diffusion of aromatic oils becomes restricted. The scent doesn’t vanish; rather, it’s temporarily trapped beneath the surface. Interestingly, while this process may attenuate the aroma, it enhances the bracelet’s aesthetic qualities because its surface appears smoother, glossier, and richer in color, often transitioning from a light tan to a deeper chestnut or umber. These visual cues are highly prized by collectors, evoking a sense of antiquity, dignity, and refined age.

In essence, agarwood is a living material, and its scent, though it may fade from the surface, is never truly lost; it simply waits beneath the patina, carrying the story of time, touch, and transformation.