Aging CASA Black Tea
Aging CASA Black Tea
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CASA Black Tea aged experiments in King Son Convertible IFP Aging Chiller at -0.8℃/30.56°F, above initial freezing point, to check if aging effects can enhance the flavor of the black tea
CASA Black Tea aging conditions and steeping method
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Tea Variety: CASA Black Tea
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5 Stage Reverse Osmosis water filtering (EC, electrical conductivity: 0.08, PH: 5.02)
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Tea steeping method
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Tea volume:10g
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Water volume:500cc
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Water to tea/powder ratio, according to ISO 3103-1980
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Glass Teapot Kettle for hot water steeping
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Water temperature:80 ℃/176.0°F
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Aging conditions
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Tea packaging: Sealed canned packaging
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Aging temperature setup: -0.8±0.3℃/30.56±0.54°F
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Aging Humidity setup: Without setup humidity (disabled humidity function)
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Aging days:0,7,15,21 days
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Matches tea liquid color by PANTONE Color Cross-Reference
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Tea Cupping Method: Whiskey Sydney Cup
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Tea liquid smell fragrance method: white porcelain smelling fragrance method
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Measurement instrument and meter
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Timo plug-in thermometer
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ATAGO PAL-1 Series Handheld Digital Sweetness Meter（Test range: 0.0～53.0%）
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EZDO 6061 Waterproof Electrical Conductivity Meter (EC meter) [Calibration solution, EC1.41]
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EZDO PH6011 pH meter [Calibration solution, PH7、PH4]
Tea hot water steeping: Tastes and compares the aged CASA Black Tea that steeped at 80℃/176.0°F to check if the aging effects can enhance the flavor of black tea
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Tea variety: CASA Black Tea (aged for one year)
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Tea hot water steeping temperature: 80±3℃/176.0±5.4°F,5 min.
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Water to tea/powder ratio, according to ISO 3103-1980:10g/500cc
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The temperature that tea liquids poured into the taste cup: 42℃/107.6°F
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Tea hot water steeping flavor
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Aged days
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Non-aged
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Aged 7 days at -0.8±0.3℃/30.56±0.54°F
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Aged 15 days at -0.8±0.3℃/30.56±0.54°F
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Aged 21 days at -0.8±0.3℃/30.56±0.54°F
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Matches tea liquid color by PANTONE Color Cross-Reference
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167C
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159C
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Tea liquid color
(1: light →5: dark) |
3
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3
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3
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2
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Aroma
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Higher grassy aroma
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In addition to the grassy aroma, the sweetness is also obviously.
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Apparent sweetness and
good black tea aroma |
Apparent sweetness and
good black tea aroma |
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Taste location
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The taste is concentrated on the tip of the tongue
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The taste is spread on the whole tongue |
The taste is spread on the whole tongue |
The taste is spread to the whole mouth |
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Astringency
(1: light→ 5: distinct) |
4
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3
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2
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1
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Body (1: light/thin→
heavy/ful:5) |
2
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2
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2
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3
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Aftertaste
(1:light→5: distinct) |
1
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2
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2
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3
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Sweetness (1-5)
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1
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2
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2
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3
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Sweetness (Brix%)
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0.2%
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0.4%
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0.4%
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0.4%
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EC (Electrical Conductivity, µS/cm)
1µS/cm=0.5ppm(TDS) : The higher the Electrical Conductivity, the more the dissolution |
0.31
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0.32
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0.32
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0.33
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pH value
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5.41
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5.40
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5.40
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5.39
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Recommend aged days
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at least, minimum aged 21 days
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The tea liquid color comparison between aged and non-aged CASA Black Tea
Conclusions
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Because CASA Black Tea is not an original whole piece tea leaves, they are in loosen tea packaging, so the number of aged days needs to be longer.
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When aged at -0.8±0.3℃/30.56±0.54°F for 7-days conditions, the sweetness of CASA Black Tea is increased, but the grassy flavor is very obvious, and the astringency is still very strong.
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When aged at -0.8±0.3℃/30.56±0.54°F conditions, to achieves satisfactory aging and taste differences that at least, minimum needs 21 days.
