People are accustomed to seeing and using different kinds of instant coffee, but the development of instant teas has lagged far behind that of instant coffee market. In the case of instant tea, the liquor (tea brew) itself is further concentrated and dried to form a powder or granular product. Hot water soluble and cold water soluble instant teas are found in the market. Process of the production of instant tea consists of the following operations, selection of raw materials, extraction, aroma stripping, cream processing, concentration and drying. Criteria for the selection of the raw material include processing requirements of the market for which the tea is intended and the commercial restrictions placed upon manufacture. Instant tea can be made from black tea leaf, (partially) fermented, undried leaf, oolong or green tea. Manufacturers in tea producing countries use fermented undried leaf as a basis for instant black tea production, as this does not have to pass through the auctions and is therefore cheaper. As per the final user of the instant tea the demand for the type of instant tea varies as hot water soluble, cold water soluble and green instant teas.
SPECIALITY AND HERBAL TEAS:
These are classified according to the raw material used and the type of manufacture adopted. Orthodox processed tea leaves produce “particular” teas like semi-fermented oolongs and reprocessed, scented and compressed teas. Delicately plucked and processed teas make numerous “prominent” teas. The raw material is taken from the plants which are well grown in an excellent habitat with advantageous ecological conditions and are made skillfully and exquisitely with delicate flush buds and leaves of the tea plants belonging to fine varieties. Herbal teas are made by processing veritable teas together with medicinal herbs, which are used to complement the curative properties of the former for many ailments.
Utilization of tea extract in various fields has increased worldwide. The extract is used as dye, detergent, deodorant, sterilization agent and medical agent such as anti-dental caries agent and anti-inflammation agent. Green leaves of tea, oolong and black teas are used as raw materials of tea extract powder. The production system of tea extract powder is almost similar to that of instant tea; extraction with hot water or aqueous ethanol, separation, concentration and spray-drying. Green tea extract powder made by this process contains about 25-30 % of polyphenol and around 20% of catechin.
USE AS DYE
Wood, silk or synthetic yarn type fibres are dyed in tea extract solution (1:20) containing 10% of tea extract powder with met-mordant at 60°C for six hours. After washing, the dyed yarn with water, the yarn weight increased by 3-5%. By metal-mordants, the colour of yarn changes to pale green, yellow-green, yellow, brown and copper-yellow. It is found that despite repeated washing or exposure to sunlight for the fading test, the colour of yarn is maintained at least for one year.
USE AS A DETERGENT
Oolong tea extract has been developed as one of the effective substitutes for (CFC) chlorofluoro carbon used to wash away oil on chips used in display coated liquid crystal. The advantages of oolong tea extract as detergent are (i) it is an organic material and therefore ecofriendly and the waste water is easily disposed of (ii) it is a safe detergent which is non toxic and non-inflammable (iii) the extract forms a high quality detergent for washing oily substances.
TEA SEED OIL
Tea seeds are used as a source of supplementary protein and edible oil for human consumption, apart from many other industrial applications. The prospects of tea seed oil are immense. It can be a substitute for any edible oil; it can also be used as a cheaper alternative to olive oil which is mostly imported. Cosmetic industry may use it for manufacturing hair lotion, soap, etc. The thiosaponin has some medicinal value. It acts as an adjuvant, anti-inflammatory agent.
Tea oil cake and waste are used as fodder and bio-manuring. Manure produced from a mixture of green tea waste and fowl dropping is sold in the Japanese manure market and is used widely in kitchen gardens for flowers and vegetables.
News & Events5
Dr. C.S. Venkata Ram Memorial Annual Tea Colloquium will be held on Aug, 2018 at Seminar Hall, UPASI Tea Research Foundation, Tea Research Institute, Valparai. The maximum time for presentation is ten minutes followed by discussion. Prizes will be awarded for the best three presentations.…Read More
The Pesticide Residue Division is equipped with state-of-art instruments viz., Gas Chromatograph, High Performance Liquid Chromatograph, GCMS, Atomic Absorption Spectrophotometer, etc., Our lab is GLP certified by National GLP Compliance Monitoring Authority, Govt. of India for the execution of Pesticide Residue Studies. We are accredited…Read More
08/09/2018 @ 09:30 am
Advertisement for the post of JRF (2 Nos.) – NTRF Funded Research Project Applications are invited for the post (2 Nos.) of Junior Research Fellows (JRF) to work in the NTRF project in Plant Pathology and Entomology divisions, UPASI Tea Research Foundation, Tea Research Institute,…Read More
Monthly Circular April -2014 WEATHER Weather data recorded in March 2014 at the TRF observatory are given below, along with the corresponding figures for March 2013. Year Total Rainfall mm Mean Sunshine hr/day Mean Temperature ° C Mean Relative Humidity % at Mean Evaporation…Read More
14-May-2019 Sealed quotations are invited from the concerned suppliers for the following lab instrument with specifications. The quotations may be sent to the Director, UPASI Tea Research Foundation – Tea Research Institute, Nirar Dam P.O. Valparai 642 127 to reach on or before 31st May…Read More
Ajaikumar, S., Siby Mathew, R. Raj Kumar and P. Mohan Kumar (2014). Mechanical harvesting in tea: A case study of Pasuparai estate. Journal of Plantation Crops. 42(2): 201-214. Ajay, D. and Baby, U.I. 2010. Induction of systemic resistance to Exobasidium vexans in tea through SAR…Read More
The principal landmark in the history of tea research in south India, was the establishment of a Tea Experimental Station in Gudalur in 1926. During the last seven and half decades, this research organisation. Now known as the UPASI Tea Research Foundation (UPASI TRF), had…Read More
Annual Report is the one among the major publications of UPASI TRF. Annual report of each year is released by September of the following year. Other publications include Research Highlights and half yearly Newsletters. The Bulletin of UPASI TRF is an occasional publication. The Handbook…Read More
DATE: 10-12 December 2014
PLACE: KozhikodeRead More
Research Extension Meeting
DATE: 06-08 May 2013
PLACE: ValparaiRead More
JOINT AREA SCIENTIFIC SYMPOSIA (JASS)
INTERNATIONAL TEA CONVENTION
Dr.C.S. Venkata Ram Annual Tea Colloquium
DATE: 1 August 2013
PLACE: VALPARAIRead More
INTERACTIVE SESSIONS / WORKSHOPS
PLACE: VALPARAIRead More
PLATINUM JUBILEE SYMPOSIUM
PLACE: ChennaiRead More
PLANTATION CROPS SYMPOSIUM 2014
UPASI ANNUAL CONFERENCE
DATE: September 2013
PLACE: CoonoorRead More
Of late, considering the constant usage of pesticides and to monitor the residues in the final produce, a well equipped test facility was established at UPASI TRI in 1994. The pesticide residue laboratory is accredited by National Accreditation Board for testing and calibration Laboratories (NABL)…Read More
The Tea Research Institute at Valparai has seven divisions namely Botany, Soil Chemistry, Entomology, Pesticide Residue, Plant Pathology & Microbiology, Plant Physiology & Biotechnology and Tea Technology. Botany Research activities of Botany Division include plant improvement, cultivation practices and weed research. Plant improvement programme was…Read More
Chemistry Division is involved in research pertaining to soil-plant nutrients of tea besides extending analytical service to the industry. The research activities include investigations on physico-chemical properties of soil, soil-plant interactions, response of tea to major, secondary and micronutrients and their interactions. The research work…Read More
Entomology Division involve in basic and applied aspects of insect pests, particularly, biology, ecology and evolving control measures. The division evolved and recommended physical, chemical and biological method of tea pests control. In the past, extensive studies on bioecology, crop loss due to major pests…Read More
Pathology & Microbiology
In the division of Plant Pathology & Microbiology, research is carried out on diseases of tea and biofertilizers. Among the tea diseases, blister blight is the most important leaf disease caused by the pathogen, Exobasidium vexans affecting the tender harvestable shoots of tea resulting in…Read More
Physiology & Biotechnology
Plant Physiology Division was established in 1980 which has been primarily concentrated on crop productivity. The division strives for excellence in applied research in tea productivity and bush health besides biotechnological studies. The research undertaken extends over a wide range of research programmes having collaborative…Read More
Besides offering the analytical services and involving in inter laboratory ring test to validate the test methods, Tea Technology Division is concerned about quality of final produce in accordance with PFA Act requirements, storage studies, value added products and manufacturing aspects. The laboratory has been…Read More