CN103535457B - Compressed white tea preparation method and compressed white tea product - Google Patents
Compressed white tea preparation method and compressed white tea product Download PDFInfo
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Abstract
The invention discloses a compressed white tea preparation method. According to the method, finished loose-packed white tea products are used as raw material tea. The method comprises the specific steps of (1) humidifying to soften the raw material tea, and mold-pressing the softened raw material tea to be in a preset shape; (2) drying the raw material tea, which is mold-pressed to be in the preset shape, until preset water content is achieved through vacuum dehumidifying and with the assistance of light wave heating and/or microwave heating and cooling measures to obtain the required compressed white tea. The compressed white tea prepared by the method disclosed by the invention breaks through the technical limitations that conventional finished white tea products can be only loose-packed tea and the fermentation degree of compressed tea prepared from the loose-packed white tea cannot be controlled, the pressure resistance of the tea is improved, the transportation and the carrying of the tea are facilitated, and the storage condition of the tea is simple.
Description
Technical field
The present invention relates to a kind of white tea compressed tea preparation method, and the white tea compressed tea utilizing the method to prepare.
Background technology
Compressed tea is made traditionally with the black tea that Pu'er tea, six fort tea are representative, this is because black tea is after fermentation tea, be pressed on " wet heap " effect that causes and growing of probio together and not only there is no harm, also contribute to the biochemical reaction in tealeaves, contribute to the fermentation of tealeaves.And, make compressed tea also the depositing of convenient tea leaf, be beneficial to the long-time spontaneous fermentation in tealeaves later stage.White Camellia, in light fermented tea, is the special treasure in China's teas, and its fermentation completes in loose tea manufacturing process, if make compressed tea, each procedure in manufacture craft cannot be completed, also the attenuation degree of uncontrollable tealeaves, therefore white tea is loose tea traditionally.
But as loose tea, not only easily make moist and turn green, easily absorb peculiar smell, storage condition is required harsh, and easily broken, not Portable belt.
Summary of the invention
For the deficiency that existing white tea loose tea exists, the object of the present invention is to provide a kind of preparation method of white tea compressed tea, utilize the method that white tea is made compressed tea, both the distinctive local flavor of white tea, quality had been kept, the protection against the tide contributing to again white tea and the absorption reduced peculiar smell, extend the tealeaves shelf-life, facilitate depositing and carrying of white tea simultaneously.
For achieving the above object, the present invention's white tea compressed tea preparation method is using the white tea loose tea of finished product as raw tea material, and the quality of the white tea compressed tea of prepared every block finished product is 15--5000g, and concrete steps are:
1) raw tea material is carried out humidification, and it is standing softening the raw tea material after humidification to be placed in anaerobic environment, the Ye Wen of period control raw tea material, to suppress non-enzymatic oxidation, hydrothermal effect and " wet heap " effect in raw tea material;
2) bulk raw tea material of having softened being molded into predetermined shape (comprises; Sheet, pie, bricked, a small bay in a river shape etc.);
3) described block stock tea is placed in vacuum environment, by vacuum dehumidifying, and is aided with optical wave heating and/or heating using microwave and cooling way, block stock tea is dried to predetermined moisture content, obtains the white tea compressed tea of required finished product; Wherein, vacuum dehumidifying is for accelerating the discharge of steam in moisture in block stock tea and vacuum environment, optical wave heating is in order to accelerate the discharge of block stock tea top layer moisture, solidify its surface, stablize its shape, heating using microwave is shifted to top layer for impelling the moisture of block stock tea deep layer, cools the Ye Wen for controlling block raw tea material, shorten the time that block stock tea is in high humidity, high temperature, to suppress the biochemical reaction in block stock tea; Vacuum dehumidifying and optical wave heating and/or heating using microwave are carried out simultaneously or hocket, and vacuum dehumidifying carries out simultaneously with cooling or hockets.
Further, complete described step 2) after, first utilize vacuum dehumidifying to discharge the moisture on described block stock tea top layer fast, to stablize its shape, and then carry out described step 3).
Further, in described step 1) when raw tea material humidification is softened, control humidification degree, avoid tea juice to run off.
Further, in described step 2) in when mold pressing is carried out to raw tea material, control mold pressing speed, avoid crowded broken tea.
Further, through described step 2) after mold pressing, the inclusion in the tealeaves that mold pressing goes out is detained and is being extruded between the surface of tealeaves and adjacent tealeaves blade.
Further, described step 2) raw tea material is molded into bulk after, first pressurize 3-10 minutes, and then carry out step 3), with the shape of stable block stock tea.
Further, completing steps 2) after, first described block stock tea is put into conformal mould, is placed in vacuum environment, and then carry out step 3); Conformal mould has the inner chamber with block stock tea mating shapes, mould side wall is provided with the open-work of discharging for air and moisture.
Further, described vacuum environment, can be vacuum chamber, vacuum tank (cabinet) or vacuum box, select according to required production capacity.
Further, described predetermined moisture content is≤6%.
Further, described white tea bag is drawn together " great Bai " that pick up from large white tea tree, picks up from " narcissus is white " of narcissus tea tree, picks up from " little Bai " of dish tea tree.
A kind of white tea compressed tea, is made up of above-mentioned either method.
White Camellia is in micro-fermented tea, and its manufacture craft is not fried and do not rubbed, through withering, low temperature dry (solarization) do, pick up pick, the operation such as complex fire is made.Every procedure all must strictly be undertaken by standard, could form its distinctive interior quality, form the local flavor of its uniqueness, and these operations cannot be over-molded at tealeaves and carry out afterwards together, therefore the present invention, using the white tea loose tea of the finished product made as raw tea material, makes white tea compressed tea.
Utilize finished product white tea loose tea to make white tea compressed tea, what face is not the peculiar taste how forming white tea, but how to keep the existing quality of raw tea material.Soften due to humidification will be carried out to raw tea material when making, water, oxygen condition possesses and will cause the non-enzymatic oxidation of tealeaves, Ye Wen is caused to rise, if have suitable temperature again, the further fermentation of tealeaves will be caused, comprise: the non-enzymatic oxidation after humidification, temperature rises the hyther produced, and the fermentation that microorganism causes, etc., these are all by the quality of feed change tea, therefore, after humidification, need that tealeaves is placed in anaerobic environment to soften, and control the temperature of tealeaves, to reduce the biochemical reaction in humidification softening stress-displacement stage tealeaves, to keep the existing quality of raw tea material.
After bulk tealeaves being molded into predetermined shape, face tealeaves equally to ferment further and the problem affecting its quality, for this reason, the present invention is by alternately adopting vacuum dehumidifying under vacuum conditions, optical wave heating and/or heating using microwave, the means such as cooling, shorten the time that block stock tea is in high humidity high temperature as far as possible, both the discharge of block stock tea internal moisture had been accelerated, suppress again non-enzymatic oxidation, hyther, the biochemical reaction that wet heap effect causes, suppress the fermentation reaction that the breeding of microorganism and microorganism cause, thus raw tea material is molded into the block tealeaves biochemical reaction caused and is reduced to degree little as far as possible, to keep the speciality of the established white tea of finished product white tea loose tea.
Heating using microwave is carried out under adopting vacuum state in dry run, except impelling the moisture of block stock tea inner deep except the transfer of top layer, avoid the non-enzymatic oxidation in tealeaves, it is temperature required that negative pressure state again reduces moisture evaporation, reduce hyther to the infringement of tea matter, meanwhile, heating using microwave also contributes to the microorganism killed in tealeaves, suppresses the breeding of microorganism.
After raw tea material is molded into bulk, while utilizing light wave, microwave to carry out heat drying, vacuum dehumidifying should be carried out, to make block stock tea inner deep distribute maintenance balance to the moisture on top layer, and effectively prevent block stock tea from being soaked by water liquid, steam backflow, ensure the stable of its shape.
Block stock tea after mold pressing is put into conformal mould dry, effectively can keep the stable of block raw tea material shape.Certainly, block stock tea needs its surface sizing at least dry in conformal mould.
White tea is made compressed tea by the present invention, breaching the white tea of finished product in the past can only be loose tea, make the compressed tea then technology such as its attenuation degree uncontrollable restriction, improve the resistance to pressure of tealeaves, facilitate the transport of tealeaves, carry, reduce the tealeaves moisture absorption, absorb peculiar smell, reduce the requirement of tealeaves to storage condition.Compared with loose tea, white tea fall apart leaf inclusion by mold pressing be extruded more thorough, add the resistance to bubble of white tea, improve the utilization rate of tealeaves.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
With the white loose tea of finished product narcissus for raw tea material, the white tea compressed tea of processing brick shape.Concrete steps are as follows:
1) raw tea material is poured into bamboo sieve to make thinner and carry out humidification.Add hygroscopic water to do to carry out for twice, first humidification, to " half-dried wet ", beaten heap after mixing thoroughly, is fully drawn in tealeaves to make moisture.After humidification, tealeaves is inserted in vacuum environment and leave standstill, be aided with cooling provision, to control tealeaves temperature below 18 DEG C simultaneously.Until first time humidification moisture absorbed by tealeaves completely after, as front operation, humidification is once, soft with the tealeaves food value of leaf again, is tack-freely advisable.
To raw tea material carry out humidification soften time, moisture addition and interpolation speed need be controlled, should ensure that tealeaves fully absorbs moisture and softens, prevent tea juice to run off again, lose the beneficial of tealeaves.
Because non-enzymatic oxidation can be generated heat by nature after tealeaves moisture absorption, cause temperature to rise, and reduce tea aroma, produce vexed taste, etc., therefore, humidification to be placed in vacuum environment and to control tealeaves temperature and is no more than 18 DEG C, can effectively suppress like this tealeaves without the negative effect such as enzymatic oxidation, hyther.
Humidification being carried out to raw material, by having left standstill after stirring evenly to tealeaves spray water, can leave standstill after also can utilizing atomized water that tealeaves is wetting.Raw tea material weightening finish about about 20% one 30% after humidification.
2) utilize the mould with brick shape die cavity that the raw tea material of having softened is molded into brick shape, each brick shape weight in wet base about 250 grams, control the speed of mold pressing, prevent tealeaves squeezed broken, and by pressurize 3-10 minutes, make the tea juice in each tealeaves blade fully be spilled over to blade face, and be detained between adjacent tealeaves blade.The tea juice overflowed is not only as the effective ingredient in millet paste when brewing in the future, and adhesive component wherein also contributes to the coherent condition after making tealeaves keep mold pressing.
3) brick shape raw tea material taken out from mould and put into the conformal mould that side wall array has air-vent, together inserting vacuum chamber together with conformal mould and vacuumize.With the die cavity suitable with brick shape in conformal mould.
Loose tea is being moulded to the initial stage of brick shape, and because moisture content is higher, brick shape shape is unstable, after thus taking out from mould, by vacuum dehumidifying, need reduce the moisture on brick shape top layer fast, make the dry and hard sclerosis in top layer, to solidify brick shape shape.For avoiding brick shape raw tea material in vacuum loose, preferably brick shape being put into conformal mould, then vacuumizing.
Along with the carrying out vacuumized, dehydration is hardened by brick shape raw tea material top layer, makes brick shape shape obtain primary solidification thus.
4) means such as vacuum dehumidifying, heating using microwave, optical wave heating, cooling are utilized further to the brick shape raw tea material that shape obtains primary solidification, discharge moisture wherein as early as possible, its moisture content is reduced to less than 6%, as 2%, forms the white tea compressed tea of product to obtain required brick.The every block of this finished product white tea compressed tea is about 200g.
After brick shape shape obtains primary solidification, utilize merely vacuum dehumidifying to discharge moisture wherein, the time not only needed is longer, obstruction also can be caused to the discharge of nexine moisture in the top layer of the first dehydration of brick shape, therefore, in order to discharge the moisture of nexine as early as possible, need to be aided with the means such as heating using microwave, optical wave heating, simultaneously, in order to prevent brick shape inner long-time high humidity, high temperature, and cause disadvantageous biochemical reaction, also to be aided with cooling way, the temperature of the brick shape after heating is reduced to less than 18 DEG C as early as possible.Heating and cooling need hocket, and vacuumize and then can carry out with heating or cool simultaneously.
Microwave is utilized to heat brick shape raw tea material, not only can accelerate the transfer of nexine moisture to top layer, contribute to the quick discharge of moisture, the moisture content that vacuum dehumidifying contributes to nexine and top layer keeps balancing, avoid cracking, and effectively prevent block stock tea from being soaked by water liquid, steam backflow, ensure the stable of its shape.And microwave also contributes to the microorganism killed in tealeaves, suppress the breeding of microorganism, suppress the fermentation reaction that microorganism causes.
Utilize optical wave heating, then can accelerate the discharge of brick shape raw tea material top layer moisture further, sclerosis brick shape top layer, stablizes brick shape shape further further.
Obtain the brick shape raw tea material of primary solidification, be in moist accumulation situation, once the temperature of its inside is for a long time more than 30 DEG C, " wet heap effect " will be produced or cause without a series of biochemical reactions such as enzymatic oxidation, hyther, fermentable, therefore, discharging at heat drying in the process of moisture in brick shape, vacuum dehumidifying need be aided with, and the temperature of tealeaves is controlled by cooling, to suppress its biochemical reaction, reduce the adverse effect that biochemical reaction brings as far as possible.
Embodiment 2
With finished product great Bai tea loose tea for raw tea material, process discoid white tea compressed tea cake.Concrete steps are as follows:
1) raw tea material is poured into bamboo sieve to make thinner and carry out humidification.Add hygroscopic water to do to carry out for twice, first humidification, to " half-dried wet ", beats heap after mixing thoroughly, to make moisture be fully drawn in tealeaves, and is inserted by the tealeaves after humidification in vacuum environment standing, is aided with cooling provision, to control tealeaves temperature below 20 DEG C simultaneously.Until first time humidification moisture absorbed by tealeaves completely after, carry out second time humidification.Control moisture addition and add speed, should ensure that tealeaves fully absorbs moisture and softens, prevent tea juice to run off again.
Humidification adopts to tealeaves spray water and is statically placed in vacuum environment after stirring evenly.Raw tea material weightening finish about about 20% one 30% after humidification.
2) mould with discoid die cavity is utilized to be molded into discoid by the raw tea material of having softened, each discoid raw tea material weight in wet base about 620 grams, pressurize 3-10 minutes.
3) discoid raw tea material taken out from mould and put into the conformal mould that side wall array has air-vent, together inserting in vacuum environment together with conformal mould and carry out vacuum dehumidifying.
4) means such as vacuum dehumidifying, heating using microwave, optical wave heating, cooling are utilized further to the discoid raw tea material that shape obtains primary solidification, discharge moisture wherein as early as possible, its moisture content is reduced to 2%, finally obtain white tea compressed tea cake.The quality of every block finished product white tea compressed tea cake is about 500 grams.
Embodiment 3
With finished product little Bai tea loose tea for raw tea material, the white tea of processing steamed bread of corn shape presses Tuo tea.Concrete steps are as follows:
1) raw tea material is poured into bamboo sieve to make thinner and carry out humidification.Add hygroscopic water to do to carry out for twice, first humidification, to " half-dried wet ", beaten heap after mixing thoroughly, is placed in vacuum environment, controls tealeaves temperature below 35 DEG C simultaneously.Until first time humidification moisture absorbed by tealeaves completely after, carry out second time humidification.Control moisture addition and add speed, should ensure that tealeaves fully absorbs moisture and softens, prevent tea juice to run off again.
Humidification has left standstill after utilizing atomized water that tealeaves is wetting.Raw tea material weightening finish about about 20% one 30% after humidification.
2) mould with steamed bread of corn shape die cavity is utilized the raw tea material of having softened to be molded into steamed bread of corn shape, the weight in wet base of each steamed bread of corn shape raw tea material about 125 grams, pressurize 3-10 minutes.
3) steamed bread of corn shape raw tea material taken out from mould and put into the conformal mould that side wall array has air-vent, together inserting in vacuum environment together with conformal mould and carry out vacuum dehumidifying.
4) means such as vacuum dehumidifying, heating using microwave, optical wave heating, cooling are utilized further to the steamed bread of corn shape raw tea material that shape obtains primary solidification, discharge moisture wherein as early as possible, its moisture content is reduced to 2%, obtain the required white tea of steamed bread of corn shape and press Tuo tea.The quality that the white tea of each finished product presses Tuo tea is about 100 grams.
Embodiment 4
With finished product little Bai tea loose tea for raw tea material, the white tea compressed tea of processing strip, the cross section of strip can be rectangle, also can be circular.Concrete steps are as follows:
1) raw tea material is poured into bamboo sieve to make thinner and carry out humidification.Add hygroscopic water to do to carry out for twice, first humidification, to " half-dried wet ", beaten heap after mixing thoroughly, is placed in vacuum environment.Control tealeaves temperature below 25 DEG C simultaneously.Until first time humidification moisture absorbed by tealeaves completely after, as front operation, humidification is once, soft with the tealeaves food value of leaf again, is tack-freely advisable.
Humidification adopts to tealeaves spray water and has left standstill after stirring evenly.Raw tea material weightening finish about about 30% after humidification.
2) utilize the mould with strip die cavity that the raw tea material of having softened is molded into strip, each strip raw tea material weight in wet base about 65 grams, control the speed of mold pressing, prevent tealeaves squeezed broken, and by pressurize 3-10 minutes, make the tea juice in each tealeaves blade fully be spilled over to blade face, and be detained between adjacent tealeaves blade.
3) strip raw tea material taken out from mould and put into the conformal mould that side wall array has air-vent, together inserting vacuum chamber together with conformal mould and vacuumize.
4) means such as vacuum, heating using microwave, optical wave heating, cooling are utilized further to the strip raw tea material that shape obtains primary solidification, discharge moisture wherein as early as possible, its moisture content is reduced to less than 5%, obtains the white tea compressed tea of strip that each quality is about 50 grams.
Only give the example of several white tea although above-mentioned, according to the principle introduced in description of the present invention, the white tea compressed tea of different white tea kind, difformity, different grammes per square metre can be produced, therefore, be succinct word, will not enumerate at this.
Claims (1)
1. a white tea compressed tea preparation method, the method is using the white tea loose tea of finished product as raw tea material, and the quality of the white tea compressed tea of prepared every block finished product is 15-5000g, and concrete steps are:
1) raw tea material is carried out humidification, by stirring evenly carry out humidification to tealeaves spray water, or utilize atomized water to be soaked by tealeaves, and it is standing softening the raw tea material after humidification to be placed in vacuum environment, the Ye Wen of period control raw tea material, to suppress non-enzymatic oxidation, hyther and the ＂ wet heap ＂ effect in raw tea material;
2) raw tea material of having softened is molded into the bulk of predetermined shape;
3) described block stock tea is placed in vacuum environment, by vacuum dehumidifying, and is aided with optical wave heating and/or heating using microwave and cooling way, block stock tea is dried to predetermined moisture content, obtains the white tea compressed tea of required finished product; Wherein, vacuum dehumidifying is for accelerating the discharge of steam in moisture in block stock tea and vacuum environment, optical wave heating is in order to accelerate the discharge of block stock tea top layer moisture, solidify its surface, stablize its shape, heating using microwave is shifted to top layer for impelling the moisture of block stock tea deep layer, cools the Ye Wen for controlling block raw tea material, shorten the time that block stock tea is in high humidity, high temperature, to suppress the biochemical reaction in block stock tea; Vacuum dehumidifying and optical wave heating and/or heating using microwave are carried out simultaneously or hocket, and vacuum dehumidifying carries out simultaneously with cooling or hockets.
2. the method for claim 1, is characterized in that, completes described step 2) after, first utilize vacuum dehumidifying to discharge the moisture on described block stock tea top layer fast, to stablize its shape, and then carry out described step 3).
3. the method for claim 1, is characterized in that, when raw tea material humidification softens by described step 1), controls humidification degree, avoids tea juice to run off.
4. the method for claim 1, is characterized in that, in described step 2) in when mold pressing is carried out to raw tea material, control mold pressing speed, avoid crowded broken tea.
5. the method for claim 1, is characterized in that, through described step 2) after mold pressing, the inclusion in the tealeaves that mold pressing goes out is detained and is being extruded between the surface of tealeaves and adjacent tealeaves blade.
6. the method for claim 1, is characterized in that, described step 2) raw tea material is molded into bulk after, first pressurize 3-10 minute, and then carry out step 3), with the shape of stable block stock tea.
7. the method for claim 1, is characterized in that, completing steps 2) after, first described block stock tea is put into conformal mould, be placed in vacuum environment, and then carry out step 3); Conformal mould has the inner chamber with block stock tea mating shapes, mould side wall is provided with the open-work of discharging for air and moisture.
8. the method for claim 1, is characterized in that, described predetermined moisture content is≤6%.
9. the method for claim 1, is characterized in that, described white tea bag is drawn together " great Bai " that pick up from large white tea tree, picks up from " narcissus is white " of narcissus tea tree, picks up from " little Bai " of dish tea tree.
10. a white tea compressed tea, is made up of the claims 1-9 either method.
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| CN105265634A (en) * | 2014-06-10 | 2016-01-27 | 林志宾 | Preparation method for tuan-shaped green tea (tuan is a Chinese character) |
| CN105265612A (en) * | 2014-06-10 | 2016-01-27 | 林志宾 | Preparation method for tuan-shaped white tea (tuan is a Chinese character) |
| CN104543063B (en) * | 2015-01-27 | 2017-12-22 | 黄永平 | A kind of processing method of moonlight white tea |
| CN104621277A (en) * | 2015-02-01 | 2015-05-20 | 益阳仁和茶业有限公司 | Making method of compressed tea of eurotium cristatum white tea |
| CN104839363A (en) * | 2015-05-22 | 2015-08-19 | 湖南省临湘永巨茶业有限公司 | Compressed white brick tea |
| CN104920653A (en) * | 2015-05-26 | 2015-09-23 | 广西金花茶业有限公司 | Production method of black fu-brick tea with shallow fermentation |
| CN105166134A (en) * | 2015-09-24 | 2015-12-23 | 惠州市杰普特电子技术有限公司 | Method for processing white tea |
| CN105248699A (en) * | 2015-11-06 | 2016-01-20 | 林志宾 | Preparation method of compressed white tea |
| CN105248703A (en) * | 2015-11-06 | 2016-01-20 | 林志宾 | Preparation method of compressed white tea |
| CN105265627A (en) * | 2015-11-06 | 2016-01-27 | 林志宾 | Purification method for white tea |
| CN105265626A (en) * | 2015-11-06 | 2016-01-27 | 林志宾 | Purification method for white tea |
| CN105532964A (en) * | 2015-12-09 | 2016-05-04 | 林志宾 | Preparation method of white tea bag |
| CN105394224A (en) * | 2015-12-09 | 2016-03-16 | 林志宾 | Preparation method of white tea bag |
| CN109170031A (en) * | 2018-10-17 | 2019-01-11 | 广州广福心道茶业有限公司 | A kind of process of white tea compressed tea |
| CN111990497A (en) * | 2020-09-28 | 2020-11-27 | 包忠华 | Fried white tea and making process thereof |
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| CN1187942A (en) * | 1997-01-13 | 1998-07-22 | 云南海潮茶果有限责任公司 | Compact tea production technology |
| CN1064516C (en) * | 1998-06-01 | 2001-04-18 | 马海云 | Shaped tea processing method |
| CN1666626B (en) * | 2005-03-21 | 2011-06-29 | 广东省农业科学院茶叶研究所 | Processing technique of oolong tea |
| CN102754707B (en) * | 2012-07-10 | 2014-04-02 | 福州淮南子生物科技有限公司 | Tea making technology using light microwaves |
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