We like the sound of a vintage guitar that has aged slowly due to chemical changes inside the wood, repeated vibrations, UV exposure, temperature and humidity changes over long periods of time.
In the case of a typical classical instrument, the violin (well-managed), we know that the aging process continues to improve (or at least not degrade) tonal quality for up to 350 or 400 years.

Torrefaction is a process of heating wood in an oxygen-free environment to remove oils, pitch, sugars, resins, and other vibration-damping volatiles. Also, heating the wood for a suitable time at a certain temperature will redistributes the lignin, which acts as an adhesive to bond the cellulose fibers.

The torrefied wood is known to have the effect of transmitting vibrational energy more efficiently than ordinary wood, because its properties are changed and its mass is lighter. In fact, the nature of aging and torrefied wood for decades is very similar to that of a microscope.

In other words, the process of artificially creating the condition of aged acoustic guitar wood for a long period of time is called 'Torrefaction'.

Depending on the type of wood, it is said that the temperature and time range are different from those that remove elements that interfere with the vibrations without over-damaging the cellulose structure. You can simulate wood aging of various ages by adjusting the appropriate temperature and heating time. Research has shown that it can simulate the sound of a guitar that has aged more than 50 years, far from a sound that sounds like 10 years old.

The chemical and structural changes inside the woods quickly occur during the first few years, but after several decades, the change is at an extremely slow pace. We hope that the vintage series with the Torrefaction can artificially reduce the wait for the performers who prefer the vintage sound of the old guitar.