Oolong Tea (Tie Guan Yin Semi-Oxidized)

Coffee Roasts & Botanical Teas · 7 specs

Direct Answer

Tie Guan Yin is a prized semi-oxidized oolong tea (30–40% oxidation) from Anxi, China. Steeping 5g in 150ml water at 88–92°C in a Gaiwan for 45 seconds produces an orchid floral fragrance, rich theasinensins, and ~25mg caffeine per 100ml over 6+ infusions.

Source: World Tea Academy / Chinese National Standard GB/T 19598 · Last reviewed Aug 28, 2026

Specs

Product Class	Semi-Oxidized Rolled Oolong Tea (30–40% Oxidation)
Standard Brew Ratio (Leaf : Water)	5.0g in 150ml (Gongfu style 1 : 30)
Brewing Water Temperature	88 – 92°C (190 – 198°F)
Steeping Duration	45s (1st), +15s per subsequent infusion (6–8 steepings)
Oxidation Level	30 – 40% (Partial enzymatic bruising and pan firing)
Caffeine Content (per 100ml)	~25 – 35 mg mg
Bioactive Polyphenols	Theasinensins (unique oolong dimers), EGCG, L-Theanine

The Gongfu Re-steep Chemistry

Tightly rolled oolong pearls unfurl progressively over multiple hot water infusions, releasing lighter floral volatile terpenes in the first 2 steeps and deeper woody theasinensins in steeps 4 through 7.