TEA AND ALLIED PRODUCTS

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INSTANT TEA:

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.

TEA EXTRACT

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.

Bio-Manure:

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 & Events

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Articles

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  • News letter June 2020

    News Letter -2020 June

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  • Publications

    Radhakrishnan,B., K. K. Srikumar, Smitha, K. B. Suresh. 2018. Evaluation of Sulfoxaflor 50%WG against Tea mosquito bug, Helopeltistheivora Waterhouse (Hemiptera: Miridae). Pestology. 42 (3), 31-36. Radhakrishnan, B. 2018. Recent issues on pesticide residues and other contaminants in Tea. Planters chronicle. 114(1): 4-11. Radhakrishnan B. and…

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  • Latest

    12/12/12

    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…

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  • Publications and Library

    01/02/05

    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…

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Conferences Seminars

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  • National Symposium Announcement

    DATE:  22nd Jannuary, 2021

    PLACE:  

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  • PLACROSYM XXI

    DATE:  10-12 December 2014

    PLACE:  Kozhikode

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  • Research Extension Meeting

    DATE:  06-08 May 2013

    PLACE:  Valparai

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  • JOINT AREA SCIENTIFIC SYMPOSIA (JASS)

    DATE:  

    PLACE:  

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  • INTERNATIONAL TEA CONVENTION

    DATE:  

    PLACE:  

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  • TGLIA

    DATE:   2013

    PLACE:  

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  • Dr.C.S. Venkata Ram Annual Tea Colloquium

    DATE:  1 August 2013

    PLACE:  VALPARAI

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  • INTERACTIVE SESSIONS / WORKSHOPS

    DATE:  28/04/2012

    PLACE:  VALPARAI

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  • PLATINUM JUBILEE SYMPOSIUM

    DATE:  2001

    PLACE:  Chennai

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  • PLANTATION CROPS SYMPOSIUM 2014

    DATE:  2014

    PLACE:  

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Research Activities

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  • Newsletter – Dec 2019

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  • Pesticide Residue

    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)…

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  • Botany

    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…

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  • Soil Chemistry

    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…

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  • Entomology

    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…

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  • 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…

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  • 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…

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