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Tea Roasting: Techniques, Functions, Equipment & Top English Blogs

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Fully Automatic Hidden Tea Cup Machine | DL-YCBZ-90 | 35–50 Cups/Min

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Electrostatic Dust Removal Cleaner Machine | Tea Leaf Impurity Separator DL-6CJDCZ Series

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Tea Roasting: Techniques, Functions, Equipment & Top English Blogs

2025-10-27 11:20:08

1. Tea Types: Roasting Details & Functions

  • Green Tea: 80-90℃ (electric pan), 30-45mins; stir every 15mins to avoid scorching . Function: Inactivates polyphenol oxidase to retain grassy freshness and green hue.
  • Black Tea: 110-120℃ (gross fire, 15mins) → 85-95℃ (full fire, 10-20mins); cool 2hrs between stages . Function: Triggers theaflavin formation for rich, malty flavor.
  • Oolong (Yancha): Charcoal ashes heated 12hrs to white; 90-120℃, 4-36hrs (3 rounds max); flip every 30mins . Function: Develops "yan yun" (rock aroma) and reduces vegetal notes.
  • Pu’er: 60-70℃ (low-fire), 2-4hrs; spread 2cm thick . Function: Removes mustiness without destroying aging potential.
  • White Tea: 70-80℃, 1-2hrs; no stirring . Function: Preserves natural sweetness while evaporating excess moisture.

2. Core Functions

Evaporates 15-20% moisture (extends shelf life), inactivates enzymes (fixes flavor), and induces saccharification (adds sweetness) .

3. Equipment

  • Home: Purple Cloud Bamboo Roaster (110V, 30-120℃ adjustable, 500g batch) .
  • Commercial: Hondapack Rotary Roaster (electric/gas, ±1℃ precision, 50kg/batch); Delijx Gas Pot (20kg/batch, 360° heating) .

4. English Blogs

  • Valleybrook Tea: Step-by-step Wuyi oolong charcoal roasting .
  • Purple Cloud Tea House: Home roaster unboxing & troubleshooting .
  • Tea Epicure: Science of roasting (e.g., enzyme kinetics) .

5. Recommended English Books

  1. 《The Book of Coffee and Tea》(2nd Ed.)
    • Authors: Joel Schapira et al.
    • Publisher: St. Martin’s Griffin (1996)
    • ISBN: 9780312140991
    • Core: 313-page guide covering tea roasting techniques, flavor chemistry, and equipment .
  2. 《The Harney & Sons Guide to Tea》
    • Author: Michael Harney (Master Blender)
    • Publisher: Harney & Sons (272 pages)
    • Core: Roasting 工艺 for oolong/black tea, sensory evaluation methods .
  3. 《Tea Baby-Roasting Bible》
    • Source: hello-tea-baby.com (Free E-book)
    • License: Apache-2.0
    • Core: Home roasting tutorials for beginners (temp control, batch sizing) .