Aging

Aging transforms tea through slow oxidation, microbial activity, and chemical rearrangement that softens aggressive bitter and astringent compounds into smooth, complex flavors. Sheng pu-erh is the paradigm: young cakes may taste aggressively bitter and astringent, but after 10-30 years of proper storage, the same tea develops rich, sweet, woody, medicinal, or camphor-like notes with a velvety mouthfeel. Proper aging conditions are critical: temperature around 20-30 degrees Celsius, relative humidity of 60-75%, adequate air circulation, and freedom from strong odors. Hong Kong's traditional storage warehouses provide naturally humid conditions that accelerate aging, while drier storage in Kunming or Taiwan produces a slower, more nuanced evolution. Aged oolong (lao cha), particularly Wuyi yancha and old Tie Guan Yin, can also improve with decades of storage, developing a mellow, medicinal sweetness. The market for aged tea has created a collector culture where provenance, storage history, and wrapper condition significantly affect value.