DL-6CFZ-20 use vibration rotate disc to filling tea and other materials into pouch and sachet, It adopts an integrated intelligent control panel and manages all operations in a unified manner.
DL-6CFR-900 heat sealer machine usually sealing and packing tea pouch bags, it can continuous sealing with print date.
The tea mixing and flavoring machine is mainly used for mixing and blending operations of CTC tea, herbal tea, traditional tea, blended tea, etc. At the same time, it can spray atomized liquid into the machine, which can greatly mix the internal materials evenly.
DL-4CP-1210W lavender harvester machine is easy to use, added a shelf design, and the height of the harvesting can be adjusted by 20cm, cheaper than starr clier machine.
The dip tea bag packing machine is suitable for the non-returnable packaging of the inner and outer bag of small particulate materials such as: tea, herbal tea, health tea grass-root type and so on.
The electrostatic cleaner adsorption generated by 4-10 electrostatic rollers extracts impurities in the tea, such as hair, broom bristles, tea fluff ash, thatch, woven bag silk, plastic scraps, iron filings, etc.
DL-6CPYS-170 is one of the special screening machines for primary and refined tea factories. Used to separate the length of the twisted tea and the size of the block in the tea processing technology. It is suitable for various sieving operations of black tea, green tea and oolong tea.
Strip Needle Type Tea Shaping Machine is characterized by reasonable pot type, easy operation, adjustable temperature and speed. The processed tea stripes are tight and straight, with complete bud, nice strip shape and pretty green color. This machine is suitable for carding and shaping of strip shaped famous tea.
How to process 25kg striped black tea from 100kg fresh tea leaf ? striped black tea need tea withering process, rolling process, tea fermentation and drying, here are machines for your reference and checking.
Machines for making green tea, need four steps, tea withering, tea fixation, tea rolling, and tea drying. Mastering the correct processing method will help you make high-end quality tea.
The process of making unique yellow tea is mostly the same as that of green tea. But a critical process has been added. Makes a huge change in the quality and taste of tea.
Mastering the main influencing factors of drying can make black tea drying fully and give play to the unique qualities of black tea. Using the DELI tea drying machine could help you make the good black tea.
1. The effect of temperature on enzymes
There are many enzymes in tea. For example, the presence of polyphenol oxidase can catalyze the oxidation of polyphenols and make the leaves red. If a certain method is used to destroy the activity of polyphenol oxidase, the polyphenols will lose the conditions for the oxidation reaction, so they will not quickly turn red. The "fixation" process in green tea processing is to use high temperature to "Passivation" the activity of enzymes, so that the polyphenols will not be enzymatically oxidized during the subsequent rolling and drying process, thereby maintaining the green leaves of the clear soup.
The purpose of "fixation" is to use high temperature to destroy the oxidase activity, but if it is not handled properly, not only will it not destroy the enzyme activity, but it will increase the enzyme activity, causing red tea leaves and green leaves. It can be seen that the temperature has a duality on the enzyme, that is, it increases the speed of the catalytic reaction. At the same time, the speed of the passivation reaction is also increased under high temperature conditions.
It is irreversible that the enzyme is destroyed by heat, but sometimes the fixation temperature is not high enough, and the enzyme activity is inhibited without being destroyed. After the high temperature is relieved, it will regain vitality, and red stems and green leaves will appear when they are twisted or dried.