CN105248699A - Preparation method of compressed white tea - Google Patents
Preparation method of compressed white tea Download PDFInfo
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- CN105248699A CN105248699A CN201510748007.6A CN201510748007A CN105248699A CN 105248699 A CN105248699 A CN 105248699A CN 201510748007 A CN201510748007 A CN 201510748007A CN 105248699 A CN105248699 A CN 105248699A
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Abstract
The invention discloses a preparation method of compressed white tea. The method is characterized by using finished loose white tea as the raw tea, and during preparation, firstly carrying out purification treatment on the raw tea and then preparing the purified raw tea into 20-5000g of compressed white tea, wherein the specific purification treatment steps are as follows: 1) firstly wetting the tea by utilizing purified water until the tea absorbs water to be saturated; then putting the wetted tea in the vacuum environment timely and drying the tea by applying microwave until the water content is not more than 8%; 2) repeating the step 1) at least once; 3) selecting the tea by wind, sieving the tea and removing pollutant residues, thus completing purification treatment of the raw tea. The preparation method has the beneficial effects that thorough purification of the inside and outside of the raw tea is achieved under the premise of not damaging the existing aroma, taste and quality of the tea, thus ensuring the hygiene and safety of the finally prepared compressed white tea.
Description
Technical field
The present invention relates to a kind of white tea compressed tea preparation method.
Background technology
Applicant's previous application crosses a kind of white tea compressed tea preparation method, and the method, using the white tea loose tea of finished product as raw tea material, by the operation such as raw tea material humidification is softening, compression molding, drying, obtains the white tea compressed tea of bulk of 15-5000 required grammes per square metres.
Because the white tea loose tea of current finished product directly pays system by after fresh tea leaf harvesting usually, and fresh tea leaf not only surface attachment have the pollutant such as dust, worm's ovum, birds and beasts ight soil, pesticide residue, its inside is also remaining the pesticide molecule absorbed by tealeaves, thus, these pollutants enter finished product loose tea by along with the paying system of fresh leaf, and finally enter millet paste and endanger the healthy of drinking person.
Summary of the invention
For prior art Problems existing, the object of the present invention is to provide a kind of improved white tea compressed tea preparation method.The method, by increasing cleaning procedure, removes the pollutant of raw tea material surface attachment, removes the pesticide residue of raw tea material inside, to ensure the safe and sanitary of prepared white tea compressed tea.
For achieving the above object, technical solution of the present invention is as follows:
A kind of white tea compressed tea preparation method, the method, using the white tea loose tea of finished product as raw tea material, during preparation, first carries out purified treatment to raw tea material, and then by softening for the raw tea material humidification after purifying, compression molding, drying, make the white tea compressed tea of 20-5000 grammes per square metres; Wherein, the concrete steps of described purified treatment are:
1) first, utilizing pure water that tealeaves humidification is saturated to absorbing water, in humidification, controlling tealeaves temperature≤28 DEG C, control pure water simultaneously and add speed and addition, avoid tea juice to run off; Then, the tealeaves after humidification is placed in vacuum environment in time, and by applying microwave by tea-drying to moisture content≤8%; By regulating the vacuum of vacuum environment, microwave power and/or microwave continuous application time, control tealeaves temperature≤60 DEG C;
2) step 1) repeats at least one times;
3) selection by winnowing, screening are carried out to tealeaves, remove pollutant residue.
Further, described purified treatment also comprises step:
4) by tea baking to moisture content≤6%, the basic stoving temperature cured in process is≤75 DEG C, between be 80-90 DEG C with temperature temperature raising is in short-term impacted, the number of times that duration and curing that temperature raising is in short-term impacted at every turn temperature raising in short-term of inserting in process is impacted is determined according to the fragrance of tealeaves;
Further, described step 3), 4) order can exchange.
Further, in described step 4), the basic stoving temperature cured in process is≤70 DEG C.
Further, in described step 1), the humidification of tealeaves is specially: first spray pure water to tealeaves and mix thoroughly or utilize atomization pure water to infiltrate tealeaves, then the tealeaves after adding water being placed in vacuum environment and leaving standstill.
Further, in described step 1), the humidification of tealeaves is specially: tealeaves to be humidified is placed in vacuum environment, in vacuum environment, sprays pure water to tealeaves and mix rear leaving standstill thoroughly, or leaving standstill after utilizing atomization pure water to infiltrate tealeaves.
Finished product white tea loose tea is streak, and tealeaves only has outside the surface of 10% is exposed to, the surface of 90% is packed to as inner surface, and correspondingly, the dust on 90% tealeaves surface, worm's ovum, birds and beasts ight soil, agriculture is residual is wrapped in streak tealeaves.The present invention is when to raw tea material purified treatment, first that tealeaves humidification is saturated to absorbing water, and streak tealeaves is launched, makes the surface of tealeaves all become outer surface, thus for tealeaves surface contaminant stripping, remove and create conditions.
Heating using microwave is body heating, is heated inside and outside tealeaves simultaneously.Along with the applying of microwave, the moisture being absorbed into tealeaves inside during humidification is heated simultaneously and from inside to outside moves simultaneously, and the hydrone moving to tealeaves surface in a large number has then been actuated the pollutant stripping on tealeaves surface, come off.The degraded of agricultural chemicals comprises thermal decomposition and rising volatilization, temperature is higher, thermal decomposition is more abundant, volatilization is then except temperature influence, the more important thing is that the reduction evaporation rate along with ambient pressure environment will be accelerated greatly, thus, vacuum environment and heating using microwave facilitate the degraded that tealeaves is surperficial and inner agriculture is residual greatly.Along with tealeaves Cell uptake microwave vibrations, heating, also promote pesticide molecule from the stripping tealeaves cell, the hydrone from inside to outside moved then achieves the product after by residual for agriculture molecule and degraded thereof from the inner transport to tealeaves surface of tealeaves, discharge simultaneously.Selection by winnowing, screening operation achieve the final removing to the pollutant come off from tealeaves surface.
Finished product loose tea has formed distinctive white tea organoleptic quality, after dry tea absorbs water again, if run into suitable temperature again under aerobic state, further biological oxidation (being commonly called as " fermentation ") will be there is in tealeaves, and change the existing fragrance of the white tea of finished product, flavour.Therefore, in order to reduce this impact as far as possible, during humidification of the present invention, 1. controlling the addition of pure water, avoiding adding dilutional hyponatremia and causing tea juice to run off; 2. control tealeaves temperature, avoid or reduce tealeaves water suction its inside rear as far as possible the biochemical reactions such as non-enzymatic oxidation, microbial growth occur.Tealeaves to be humidified is placed in vacuum environment, and in vacuum environment, spray pure water or utilize atomization pure water to infiltrate, first vacuumizing and exhausting, rear infiltration, the effect that vacuumizes again can be produced, not only be conducive to the gas of discharging tealeaves absorption, and enable water immerse tealeaves inside fast, more easily infiltrate whole tealeaves, shorten humidification periods, reduce the biochemical reaction in tealeaves.In vacuum environment, humidification is with standing, reduces the oxygen content in environment, can suppress the further generation of the various biological oxidations of the aerobic participation in tealeaves, is to keep the original quality of tealeaves to create necessary condition.
By the finished product loose tea humidification again of drying, the fragrance of tealeaves, flavour can be weakened.After tealeaves being carried out to selection by winnowing, screening, increase baking step, and impact in the temperature raising in short-term of curing process special secondary school door and arrange 80-90 DEG C, can excite tea aroma, strengthening tea flavour, makes the fragrance of tealeaves, flavour returns to the state before purification, even stronger.And after tealeaves moisture content≤8%, even if under the short time high temperature of 90 DEG C, also can not there is undesirable biochemical reaction and affect the quality of tealeaves in tealeaves inside.
In a word, the present invention, under not damaging tealeaves and having the prerequisite of fragrance, flavour, quality, achieves the thorough purification inside and outside to raw tea material, ensure that the safe and sanitary of final prepared white tea compressed tea.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
embodiment 1
Prepare white tea compressed tea using narcissus white finished product loose tea as raw tea material, concrete steps are as follows:
1) first, finished product loose tea is poured into bamboo sieve and make thinner, spray pure water and carry out humidification;
For avoiding pure water fountain height too much, causing tea juice to run off, spraying pure water and carrying out several times, all mix thoroughly after each water spray and beat heap, to make moisture content be fully drawn in tealeaves, until tealeaves water suction is saturated.After each water spray, all timely being moved to by tealeaves in vacuum environment leaves standstill, and controls tealeaves temperature≤28 DEG C simultaneously;
To tealeaves humidification except spraying pure water, leave standstill after atomization pure water also can be utilized to be infiltrated by tealeaves;
Then, the tealeaves after humidification is placed in vacuum environment in time, and by applying microwave by tea-drying to moisture content≤8%;
In dry run, by regulating vacuum and the microwave power of vacuum environment, to control tealeaves temperature≤60 DEG C, to avoid undesirable biochemical reaction occurs in tealeaves, and affecting fragrance, the flavour of tealeaves, affecting the quality of tealeaves.Certainly, except regulating microwave power, can also adopt simultaneously intermittently apply microwave, and control the mode of each microwave continuous application time, control tealeaves temperature≤60 DEG C;
2) step 1) in triplicate;
The object that step 1) repeats is to make the pollutant of tealeaves surface attachment reliably peel off, come off, and makes residual the obtaining of the inner agriculture of tealeaves degrade as far as possible thoroughly and remove, therefore, for reaching this object, the number of times of repetition can be secondary, three times, even more times;
3) selection by winnowing, screening are carried out to tealeaves, remove pollutant residue;
4) by tea baking to moisture content≤6%, the basic stoving temperature cured in process is 75 DEG C, applies that at least 2 temperature are 95 DEG C, the temperature raising in short-term of 10 minutes duration is impacted period, obtains required purification finished product loose tea;
The teas (degree of fermentation is 20-30%) that white Camellia slightly ferments, only should set off tea perfume (or spice) with fiery perfume (or spice), should not give prominence to fiery merit.Therefore, the low fire of many employings is stewed slowly.Tea temperature can be cured for a long time at about 75 DEG C, and high temperature is in 80-95 DEG C of intervals, and the thickness at the bottom of concrete optic lobe is selected.Every Secondary Shocks duration 30 minutes;
Curing in process the object applying the impact of temperature raising is in short-term excite tea aroma, and strengthening tea flavour, makes up finished product loose tea because adding wet water absorbent by the fragrance, the flavour that weaken.The duration that each temperature raising is in short-term impacted and the whole number of times curing the impact of temperature raising in short-term of inserting in process are determined according to the fragrance of tealeaves.The temperature that temperature raising is in short-term impacted is higher, and the duration that each temperature raising is impacted should be shorter;
Step 3) and 4) order can exchange.Certainly, first remove pollutant residue, then carry out high bake temperature, contribute to the secondary pollution of preventing pollution thing;
5) by softening for the raw tea material humidification after purification, compression molding, drying, the white tea compressed tea of bulk of 20-5000 grammes per square metres is made;
It is to be noted, the object increasing step 4) makes up finished product loose tea because adding wet water absorbent by the fragrance, the flavour that weaken, make the fragrance of raw tea material, flavour returns to the state before purification, and in follow-up white tea compressed tea forming process, also raw tea material humidification can be softened, therefore, in order to Simplified flowsheet, enhance productivity, when purified treatment is carried out to raw tea material, can not step 4) be carried out, and be undertaken being used for exciting the temperature raising in short-term of tea aroma impact to be put in the forming process of follow-up white tea compressed tea.In addition, be all in order to should raw tea material be purified to the series of measures taked during raw tea material purified treatment, avoid the active ingredient in tealeaves to run off again, do not lose the existing fragrance of raw tea material, flavour.Equally, in order to ensure the quality of prepared white tea compressed tea, needing equally during preparation to prevent the active ingredient in tealeaves to run off, not losing the existing fragrance of raw tea material, flavour.The concrete steps that raw tea material after purification makes white tea compressed tea can be consulted ZL201310533934.7 patent.
embodiment 2
Prepare white tea compressed tea using great Bai tea finished product loose tea as raw tea material, concrete steps are as follows:
1) first, finished product loose tea is inserted in vacuum environment, in vacuum environment, spray pure water or utilize atomization pure water infiltrate tealeaves and leave standstill, control tealeaves temperature≤25 DEG C, until tealeaves water suction is saturated simultaneously;
Then, the tealeaves after humidification is placed in vacuum environment in time, and by applying microwave by tea-drying to moisture content≤8%;
In dry run, by regulating vacuum and the microwave power of vacuum environment, control tealeaves temperature≤55 DEG C;
2) step 1) repeats secondary;
2) selection by winnowing, screening are carried out to tealeaves, remove pollutant residue;
4) by tea baking to moisture content≤6%, the basic stoving temperature cured in process is 65 DEG C, applies that at least 2 temperature are 80 DEG C, the temperature raising in short-term of 15 minutes duration is impacted period, obtains required purification finished product loose tea;
5) by softening for the raw tea material humidification after purification, compression molding, drying, the white tea compressed tea of bulk of 20-5000 grammes per square metres is made.
embodiment 3
With little Bai tea finished product loose tea for raw tea material prepares white tea compressed tea, concrete steps are as follows:
1) first, finished product loose tea is inserted in vacuum environment, in vacuum environment, spray pure water or utilize atomization pure water infiltrate tealeaves and leave standstill, control tealeaves temperature≤20 DEG C simultaneously;
Then, the tealeaves after humidification is placed in vacuum environment in time, and by applying microwave by tea-drying to moisture content≤8%;
In dry run, by regulating vacuum and the microwave power of vacuum environment, control tealeaves temperature≤50 DEG C;
2) step 1) in triplicate;
3) selection by winnowing, screening are carried out to tealeaves, remove pollutant residue;
4) by tea baking to moisture content≤6%, the basic stoving temperature cured in process is 65 DEG C, applies that at least 2 temperature are 85 DEG C, the temperature raising in short-term of 20 minutes duration is impacted period, obtains required purification finished product loose tea;
5) by softening for the raw tea material humidification after purification, compression molding, drying, the white tea compressed tea of bulk of 20-5000 grammes per square metres is made.
Above-mentioned example is just for illustration of the present invention; embodiments of the present invention are not limited to these examples, and the various detailed description of the invention meeting inventive concept that those skilled in the art make according to the principle introduced in description of the present invention are all within protection scope of the present invention.
Claims (5)
1. a white tea compressed tea preparation method, the method is using the white tea loose tea of finished product as raw tea material, it is characterized in that, when preparing described white tea compressed tea, first purified treatment is carried out to raw tea material, and then by softening for the raw tea material humidification after purifying, compression molding, drying, make the white tea compressed tea of 20-5000 grammes per square metres; Wherein, the concrete steps of described purified treatment are:
1) first, utilizing pure water that tealeaves humidification is saturated to absorbing water, in humidification, controlling tealeaves temperature≤28 DEG C, control pure water simultaneously and add speed and addition, avoid tea juice to run off; Then, the tealeaves after humidification is placed in vacuum environment in time, and by applying microwave by tea-drying to moisture content≤8%; By regulating the vacuum of vacuum environment, microwave power and/or microwave continuous application time, control tealeaves temperature≤60 DEG C;
2) step 1) repeats at least one times;
3) selection by winnowing, screening are carried out to tealeaves, remove pollutant residue.
2. preparation method as claimed in claim 1, it is characterized in that, described purified treatment also comprises step:
4) by tea baking to moisture content≤6%, the basic stoving temperature cured in process is≤75 DEG C, between be 80-90 DEG C with temperature temperature raising is in short-term impacted, the number of times that duration and curing that temperature raising is in short-term impacted at every turn temperature raising in short-term of inserting in process is impacted is determined according to the fragrance of tealeaves;
Further, described step 3), 4) order can exchange.
3. preparation method as claimed in claim 2, it is characterized in that, in described step 4), the basic stoving temperature cured in process is≤70 DEG C.
4. preparation method as claimed in claim 1, it is characterized in that, in described step 1), the humidification of tealeaves is specially: first spray pure water to tealeaves and mix thoroughly or utilize atomization pure water to infiltrate tealeaves, then the tealeaves after adding water being placed in vacuum environment and leaving standstill.
5. preparation method as claimed in claim 1, is characterized in that, in described step 1), the humidification of tealeaves is specially: tealeaves to be humidified is placed in vacuum environment, in vacuum environment, spray pure water to tealeaves and mix rear leaving standstill thoroughly, or leaving standstill after utilizing atomization pure water to infiltrate tealeaves.
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| CN201510748007.6A CN105248699A (en) | 2015-11-06 | 2015-11-06 | Preparation method of compressed white tea |
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| CN108112713A (en) * | 2018-01-08 | 2018-06-05 | 福建农林大学 | A kind of white tea gross tea goes the blue or green method refined |
| 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 |
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Cited By (2)
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| 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 |
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Address after: 354200 Nanping City, Fujian province Jianyang District Pang Qi Road No. 6 Applicant after: Lin Zhibin Address before: 104, room 11, building 66, Wuyi Road, Wuyi Road, Nanping, Fujian, Wuyishan 354300, China Applicant before: Lin Zhibin |
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Application publication date: 20160120 |