AP493A - Process for the production of instant black tea. - Google Patents
Process for the production of instant black tea. Download PDFInfo
- Publication number
- AP493A AP493A APAP/P/1994/000689A AP9400689A AP493A AP 493 A AP493 A AP 493A AP 9400689 A AP9400689 A AP 9400689A AP 493 A AP493 A AP 493A
- Authority
- AP
- ARIPO
- Prior art keywords
- tea
- black tea
- water
- extraction
- extracted
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 244000269722 Thea sinensis Species 0.000 title claims description 64
- 235000006468 Thea sinensis Nutrition 0.000 title claims description 27
- 235000020279 black tea Nutrition 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000000284 extract Substances 0.000 claims description 21
- 235000009569 green tea Nutrition 0.000 claims description 19
- 235000013616 tea Nutrition 0.000 claims description 18
- 238000000605 extraction Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 238000000658 coextraction Methods 0.000 claims description 2
- 239000006071 cream Substances 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- RYYVLZVUVIJVGH-UHFFFAOYSA-N caffeine Chemical compound CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 description 4
- 150000008442 polyphenolic compounds Chemical class 0.000 description 4
- 235000013824 polyphenols Nutrition 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- LPHGQDQBBGAPDZ-UHFFFAOYSA-N Isocaffeine Natural products CN1C(=O)N(C)C(=O)C2=C1N(C)C=N2 LPHGQDQBBGAPDZ-UHFFFAOYSA-N 0.000 description 2
- 229960001948 caffeine Drugs 0.000 description 2
- VJEONQKOZGKCAK-UHFFFAOYSA-N caffeine Natural products CN1C(=O)N(C)C(=O)C2=C1C=CN2C VJEONQKOZGKCAK-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 241001180747 Hottea Species 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 239000006286 aqueous extract Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 235000020344 instant tea Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/18—Extraction of water soluble tea constituents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Tea And Coffee (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention relates to a process
Description
This invention relates to a process for the production of instant black tea soluble in cold water.
It is known that extracts based on black tea and, more particularly, instant black tea form a cloudy beverage at ambient temperature. The cloudiness is caused by a precipitate of a complex between caffeine and polyphenols which is known as cream of tea. This cream is insoluble in cold water and a certain additional treatment of the black tea extract is normally necessary to achieve solubility in cold water. EP 201 000 describes a process for the production of instant black tea soluble in cold water in which the black tea is extracted, green tea is separately extracted and the two extracts obtained are mixed, concentrated and evaporated to dryness. On the other hand, in this process, most of the tea cream present in the first black tea extract is actually separated in that extract by precipitation through cooling. The disadvantage of this process is that it involves two extractions which is both economically and industrially unacceptable because it leads to a further increase in the price of the instant tea obtained.
The problem addressed by the present invention was to provide a process in which the problem caused by the tea cream would be solved by carrying out a single extraction. It has been found that, by directly subjecting black tea to extraction in admixture with green tea, there is no longer any cream of tea in the sense defined above, so there is no longer any need to provide an additional treatment step for eliminating the tea cream.
Accordingly, the present invention relates to a process for the production of instant black tea soluble in cold water, in which a mixture of black tea and green tea is subjected to co-extraction with hot water under a pressure of 1 to 2 atmospheres and the extract obtained
AP/P/ 94/00689
BAD ORIGINAL ft is concentrated and then dried to obtain a tea powder soluble in cold water.
Although not wishing to be bound by a scientific theory, it seems to applicants that extraction with green tea enables the caffeine to be decomplexed from the polyphenols present in the black tea so that it forms another complex with the polyphenols of green tea, the complex thus formed being soluble in cold water so that no other treatment is necessary and an instant powder dissolving clearly in cold water is directly obtained. It has been found that the green tea and black tea have to be mixed in a certain ratio by weight in the range from 4:1 to 2:1. If too much green tea is added, the characteristic colour of the black tea is reduced where15 as, if too little green tea is added, an inadequate quantity of polyphenols is extracted from the green tea to avoid the formation of cream characteristic of black tea.
In the context of the invention, the expression green tea designates the material obtained from the tea shrub Camellia sinensis, for example the freshly picked tea leaves, the fresh leaves of green tea which are dried immediately after picking, the fresh leaves of green tea which have been heat-treated before drying to inactivate their enzymes and aqueous extracts of these leaves. It should be understood that the tea has undergone hardly any fermentation transforming it into black tea.
In the present description, black tea is understood to be the enzymatic oxidation product of green tea.
The hot water used for extraction may either be water preheated to the required temperature or water obtained by the direct injection of steam. The temperature of the water is between 90 and 130°C, preferably between 110 and 130°C and more preferably between 120 and 125°C.
The quantity of water used is between 2 and 25 parts
AP/P/ S 4 / 0 ΰ b 8 9
AP.00493
by weight and preferably between 5 and 12 parts by weight to 1 part of tea. The extraction time nay be up to 30 minutes and is preferably between 2 and 30 minutes.
The tea leaves are extracted either by percolation 5 or in countercurrent, still with tea leaves, in one or more cells equipped with a filter system preventing particles of tea leaves from entering the extract. Even with the filter system, the extract is subjected to centrifugation before concentration to eliminate fine 10 particles from the tea.
Concentration of the hot tea extract is carried out in vacuo so that the extract has a higher dry matter content by the time it arrives at the drying system. The extract is concentrated to a dry matter content of 10 to 15 30% and preferably 15 to 25% by weight.
The concentrated extract is dried either by spray drying or by freeze drying.
The process according to the invention is normally carried out under a pressure of 1 to 2 atmospheres 20 because, if it is carried out under higher pressures, unwanted products are obtained in the extract. <x
The process according to the invention may be carried out in a single step. However, it has been found that, if the process described above is repeated with a 25 fresh quantity of water, the yield is increased to 40%.
In this case, a first extraction is carried out under the conditions described above, another extraction is carried out with fresh water under the same conditions and the two extracts are combined, concentrated and dried. The 30 water used for the extractions is advantageously deionized water.
The process according to the invention gives a black tea powder which is perfectly soluble in cold water and the drink obtained by reconstitution with water has excellent stability and organoleptic properties.
AP/P; y 4 /
BAD ORIGINAL ft
The process according to the invention is illustrated by the following Examples.
Example 1
300 g of leaves in the form of a mixture of 200 g of green tea and 100 g of black tea are introduced into an extraction cell. A cover is put on to close the cell, after which 4500 g of fresh deionized water are introduced into the cell, circulating in a closed circuit by means of a pump. The water is heated to a temperature of 120°C in 45 seconds by means of a steam injection system. The back-pressure valve guarantees a pressure of 2 bar in the system. The water circulates for 15 minutes and the extract is continuously recycled.
After the 15 minutes, the pump is stopped and 2000 g of fresh deionized water are introduced to wash the partly spent leaves.
The extract is combined with this fresh washing water and concentrated to a dry matter content of 20%.
The concentrate is then spray dried, forming a powder which is perfectly soluble in cold water without any turbidity. The yield obtained is 38%, i.e. 114 g of instant powder are obtained.
Example 2
The procedure is as described in Example 1, except that a second extraction is carried out with 4500 g of fresh deionized water under the same conditions as in the first extraction step of the preceding example. The two extracts are concentrated and spray dried, a yield of 40% being obtained.
Example 3
A mixture of 60 g of green tea and 20 g of black tea 35 is used. This mixture is introduced into an extraction
AP/P/ 94/00689
AP.00493 cell where a first extraction is carried out for 15 minutes under a pressure of 1.5 bar with 1200 g of deionized water heated to 110°C.
A second extraction is then carried out with 1200 g 5 of water under the same conditions as the first extraction.
The two extracts are combined, concentrated and spray dried.
A tea powder perfectly soluble in cold water is 10 obtained in a yield of 40%.
Claims (7)
1. A process for the production of instant black tea soluble in cold cold water, wherein the black tea is extracted with hot water, characterized in that a mixture of leaves of black tea and green tea is subjected to co-extraction with hot water under a pressure of 1 to 2 atmospheres and the extract obtained is concentrated and dried to form a tea powder soluble in cold water.
2. A process as claimed in claim 1, characterized in that a mixture of green tea and black tea in a ratio by weight of 4:1 to 2:1 is used.
3. A process as claimed in claim 1 or 2,characterized in that the mixture of green tea and black tea is extracted at a temperature of 90 to 130 C.
4. A process as claimed in any of claims 1 to 3, characterized in that the extraction is carried out over a period of 2 to 30 minutes.
5. A process as claimed in any of claims 1 to 4,characterized in that the tea mixture is extracted with 2 to 25 parts of water to 1 part of tea.
6. A process as claimed in any of claims 1 to 5, characterized in that the extract is concentrated to a dry matter content of 10 to 30%.
7. A process as claimed in any of claims 1 to 6, characterized in that the spent leaves of black tea and green tea are extracted a second time before concentration of the two extracts obtained.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP93118574A EP0654221B1 (en) | 1993-11-18 | 1993-11-18 | Process for preparing instant black tea |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AP9400689A0 AP9400689A0 (en) | 1994-10-31 |
| AP493A true AP493A (en) | 1996-05-14 |
Family
ID=8213422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| APAP/P/1994/000689A AP493A (en) | 1993-11-18 | 1994-10-24 | Process for the production of instant black tea. |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US5612079A (en) |
| EP (1) | EP0654221B1 (en) |
| JP (1) | JP3643134B2 (en) |
| KR (1) | KR950013379A (en) |
| CN (1) | CN1051908C (en) |
| AP (1) | AP493A (en) |
| AT (1) | ATE198531T1 (en) |
| AU (1) | AU690922B2 (en) |
| BR (1) | BR9404477A (en) |
| CA (1) | CA2134502A1 (en) |
| DE (1) | DE69329861T2 (en) |
| DK (1) | DK0654221T3 (en) |
| ES (1) | ES2153834T3 (en) |
| GR (1) | GR3035609T3 (en) |
| PT (1) | PT654221E (en) |
| RU (1) | RU94041027A (en) |
| TW (1) | TW267096B (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6063428A (en) * | 1996-02-26 | 2000-05-16 | The Procter & Gamble Company | Green tea extract subjected to cation exchange treatment and nanofiltration to improve clarity and color |
| CA2263865C (en) * | 1996-11-29 | 2006-03-21 | Unilever Plc | Black leaf tea |
| US6503554B1 (en) * | 2000-11-13 | 2003-01-07 | Green Tea Terrace, Inc. | Method for preparing beverages containing powdered tea using a steamer |
| US7067168B1 (en) | 2002-02-13 | 2006-06-27 | Le-Nature's, Inc. | Tea brewing system |
| US20060062886A1 (en) * | 2004-09-22 | 2006-03-23 | Brian Takeda | Instant tea powder |
| US7829132B2 (en) | 2004-11-03 | 2010-11-09 | Unilever Bestfoods, North America Division Of Conopco, Inc. | Consumable tea composition with antioxidants |
| KR100678509B1 (en) * | 2004-11-11 | 2007-02-07 | 김숙자 | Liquid black tea composition for health drinks and preparation method thereof |
| KR100626277B1 (en) * | 2005-01-26 | 2006-09-22 | 이상빈 | Granulated green tea and its manufacturing method |
| US7833777B2 (en) * | 2005-08-22 | 2010-11-16 | Nature Technologies International Llc | Stabilized actively aerated compost tea |
| CN100364432C (en) * | 2006-01-25 | 2008-01-30 | 中南大学 | Production method of low-fluorine, low-aluminum instant black tea |
| KR100798425B1 (en) * | 2006-05-27 | 2008-01-29 | 전현철 | Cool pure green tea composition easily brews in cold water and its manufacturing method |
| CN101164424B (en) * | 2006-10-18 | 2010-04-21 | 大闽食品（漳州）有限公司 | Method for preparing instant tea powder |
| CN101167507B (en) * | 2006-10-24 | 2011-11-02 | 株式会社伊藤园 | Method for preparing tea extraction liquor |
| CN101088353B (en) * | 2007-02-12 | 2011-09-07 | 傅竹生 | Instant organic red tea producing process |
| WO2009087014A1 (en) * | 2008-01-11 | 2009-07-16 | Unilever Plc | Solid water soluble tea composition |
| JP5525178B2 (en) * | 2009-04-24 | 2014-06-18 | アサヒ飲料株式会社 | Method for producing tea extract |
| JP5751750B2 (en) | 2009-12-21 | 2015-07-22 | 花王株式会社 | Instant tea |
| WO2013060710A2 (en) * | 2011-10-28 | 2013-05-02 | Unilever N.V. | A topical composition |
| CN102429060B (en) * | 2011-12-27 | 2013-07-10 | 深圳市深宝华城科技有限公司 | Making method of high-aroma instant black tea powder |
| CN102742692A (en) * | 2012-07-24 | 2012-10-24 | 安徽省黄山市祁眉茶旅有限公司 | Blending process of black tea |
| JP2015146758A (en) * | 2014-02-06 | 2015-08-20 | 花王株式会社 | manufacturing method of catechin-containing beverage |
| CN109548931A (en) * | 2019-01-07 | 2019-04-02 | 昭通学院 | A kind of Rhizoma Gastrodiae instant tea and preparation method thereof |
| CN109938134A (en) * | 2019-04-11 | 2019-06-28 | 福州帅宝生物科技有限公司 | A kind of instant Semen Coicis black tea and preparation method thereof |
| JP2020182399A (en) * | 2019-05-07 | 2020-11-12 | 日研フード株式会社 | Green tea extract and its manufacturing method, green tea extract powder and instant green tea manufacturing method using this |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1380135A (en) * | 1971-03-05 | 1975-01-08 | Unilever Ltd | Cold water soluble tea |
| US4732773A (en) * | 1982-07-17 | 1988-03-22 | Kruger Gmbh & Co. Kg | Instant beverage and instant tea |
| US4900574A (en) * | 1983-07-29 | 1990-02-13 | Mars G.B. Limited | Soluble or dissolved tea product |
| EP0201000B1 (en) * | 1985-05-08 | 1991-06-12 | Societe Des Produits Nestle S.A. | Stabilisation of tea in cold water |
| EP0296849B1 (en) * | 1987-06-26 | 1993-01-07 | Unilever Plc | Process for the preparation of an instant tea product |
| EP0391468B1 (en) * | 1989-04-06 | 1993-09-15 | Unilever N.V. | Process of preparing a tea product |
| WO1993025085A1 (en) * | 1992-06-10 | 1993-12-23 | Stephan Guenter | Water-soluble, instant tea product |
| EP0456023B1 (en) * | 1990-05-09 | 1994-06-15 | Societe Des Produits Nestle S.A. | Process for preparation of catechol complexes |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB940867A (en) * | 1958-10-17 | 1963-11-06 | Charles Alfred Longley | Improvements in or relating to tea and coffee preparations |
| US4357361A (en) * | 1981-06-11 | 1982-11-02 | Societe D'assistance Technique Pour Produits Nestle S.A. | Cold soluble tea |
| US4410556A (en) * | 1981-06-11 | 1983-10-18 | Societe D'assistance Technique Pour Produits Nestle S.A. | Powdered tea extract |
| US4668525A (en) * | 1982-01-05 | 1987-05-26 | Thomas J. Lipton, Inc. | Tea extraction process |
| US4490402A (en) * | 1982-12-06 | 1984-12-25 | Societe D'assistance Technique Pour Produits Nestle S. A. | Process for preparing cold soluble tea product |
| US4680193A (en) * | 1985-05-08 | 1987-07-14 | Nestec S.A. | Solubilization of tea in cold water with catechin |
| US4748033A (en) * | 1986-05-07 | 1988-05-31 | The Procter & Gamble Company | Tea concentrate having freeze thaw stability and enhanced cold water solubility |
| US4717579A (en) * | 1986-05-07 | 1988-01-05 | The Procter & Gamble Co. | Flowable frozen tea mix concentrate which contains high levels of sugar |
| ES2103568T3 (en) * | 1992-12-22 | 1997-09-16 | Unilever Nv | PROCEDURE TO MANUFACTURE READY TO DRINK YOU SOLUBLE IN COLD WATER AND STABLE IN COLD. |
-
1993
- 1993-11-18 DE DE69329861T patent/DE69329861T2/en not_active Expired - Fee Related
- 1993-11-18 AT AT93118574T patent/ATE198531T1/en not_active IP Right Cessation
- 1993-11-18 DK DK93118574T patent/DK0654221T3/en active
- 1993-11-18 EP EP93118574A patent/EP0654221B1/en not_active Expired - Lifetime
- 1993-11-18 ES ES93118574T patent/ES2153834T3/en not_active Expired - Lifetime
- 1993-11-18 PT PT93118574T patent/PT654221E/en unknown
-
1994
- 1994-10-12 US US08/321,542 patent/US5612079A/en not_active Expired - Fee Related
- 1994-10-14 TW TW083109550A patent/TW267096B/zh active
- 1994-10-24 AP APAP/P/1994/000689A patent/AP493A/en active
- 1994-10-26 AU AU77477/94A patent/AU690922B2/en not_active Ceased
- 1994-10-27 CA CA002134502A patent/CA2134502A1/en not_active Abandoned
- 1994-11-11 CN CN94117918A patent/CN1051908C/en not_active Expired - Fee Related
- 1994-11-16 KR KR1019940030106A patent/KR950013379A/en not_active Withdrawn
- 1994-11-17 JP JP28304294A patent/JP3643134B2/en not_active Expired - Fee Related
- 1994-11-17 BR BR9404477A patent/BR9404477A/en not_active Application Discontinuation
- 1994-11-18 RU RU94041027/13A patent/RU94041027A/en unknown
-
2001
- 2001-03-20 GR GR20010400455T patent/GR3035609T3/en not_active IP Right Cessation
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1380135A (en) * | 1971-03-05 | 1975-01-08 | Unilever Ltd | Cold water soluble tea |
| US4732773A (en) * | 1982-07-17 | 1988-03-22 | Kruger Gmbh & Co. Kg | Instant beverage and instant tea |
| US4900574A (en) * | 1983-07-29 | 1990-02-13 | Mars G.B. Limited | Soluble or dissolved tea product |
| EP0201000B1 (en) * | 1985-05-08 | 1991-06-12 | Societe Des Produits Nestle S.A. | Stabilisation of tea in cold water |
| EP0296849B1 (en) * | 1987-06-26 | 1993-01-07 | Unilever Plc | Process for the preparation of an instant tea product |
| EP0391468B1 (en) * | 1989-04-06 | 1993-09-15 | Unilever N.V. | Process of preparing a tea product |
| EP0456023B1 (en) * | 1990-05-09 | 1994-06-15 | Societe Des Produits Nestle S.A. | Process for preparation of catechol complexes |
| WO1993025085A1 (en) * | 1992-06-10 | 1993-12-23 | Stephan Guenter | Water-soluble, instant tea product |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051908C (en) | 2000-05-03 |
| ATE198531T1 (en) | 2001-01-15 |
| JP3643134B2 (en) | 2005-04-27 |
| JPH07194303A (en) | 1995-08-01 |
| DK0654221T3 (en) | 2001-04-09 |
| DE69329861D1 (en) | 2004-05-06 |
| TW267096B (en) | 1996-01-01 |
| AU7747794A (en) | 1995-05-25 |
| KR950013379A (en) | 1995-06-15 |
| AU690922B2 (en) | 1998-05-07 |
| CA2134502A1 (en) | 1995-05-19 |
| EP0654221A1 (en) | 1995-05-24 |
| AP9400689A0 (en) | 1994-10-31 |
| RU94041027A (en) | 1997-02-10 |
| ES2153834T3 (en) | 2001-03-16 |
| CN1105524A (en) | 1995-07-26 |
| PT654221E (en) | 2001-04-30 |
| BR9404477A (en) | 1995-07-11 |
| US5612079A (en) | 1997-03-18 |
| EP0654221B1 (en) | 2001-01-10 |
| DE69329861T2 (en) | 2004-08-19 |
| GR3035609T3 (en) | 2001-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AP493A (en) | Process for the production of instant black tea. | |
| US3971858A (en) | Extracting tea using an aqueous solution of ammonium bicarbonate or ammonia | |
| KR100349046B1 (en) | How to make instant black tea | |
| IE65804B1 (en) | Water soluble tea extracts | |
| US4490402A (en) | Process for preparing cold soluble tea product | |
| EP0481262A2 (en) | Treatment of black tea | |
| CN112155077A (en) | Instant ultramicro green tea powder and preparation method thereof | |
| US20080057172A1 (en) | Process for Making Tea Extracts | |
| US20080095913A1 (en) | Process for Making Tea Extracts | |
| US20080254189A1 (en) | Process for Making Tea Extracts | |
| JP4198862B2 (en) | Method for producing tea concentrate | |
| CN114190448B (en) | Processing method of cold water-soluble instant black tea, instant black tea and application of instant black tea | |
| US4552769A (en) | Cold soluble tea | |
| KR19980073989A (en) | Method of Making Green Tea Powder Tea | |
| EP1835813B1 (en) | Cold water soluble tea extract | |
| CN1074090A (en) | The production technology of instant tea | |
| KR880000212B1 (en) | Manufacturing method of soluble coffee product | |
| EP2651236B1 (en) | Process for manufacturing a tea product | |
| CN121465124A (en) | A method for preparing instant tea powder by low-temperature vacuum flash extraction coupled with molecular encapsulation | |
| JPS63167742A (en) | Preparation of instantly soluble powder | |
| CN108740169A (en) | A kind of low-caffeine protects fragrant instant tea powder and preparation method thereof |