GOST-1938-1990-ENG.pdf
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1、U S S R S T A T E S T A N D A R D PACKAGED BLACK BAYKH TEA SPECIFICATIONS GOST 1938-90 Official Edition USSR STATE COMMITTEE FOR PRODUCT QUALITY MANAGEMENT AND STANDARDS M o s c o w UDC 663.95: 006.354Group H56 USSR STATE STANDARD PACKAGED BLACK BAYKH TEA Specifications OKP (All-Union Product Classi
2、fication Code) 91 91111 GOST 1938-90 Term from 01.05.91 to 01.05.96 This Standard applies to packaged domestic and imported black baykh tea or tea obtained by blending loose black tea. 1. TECHNICAL REQUIREMENTS 1.1. Packaged black baykh tea shall be produced according to the requirements of this Sta
3、ndard, the process instructions and recipes observing the sanitary norms and rules approved in accordance with the established procedure. 1.2. Characteristics 1.2.1. Tea is produced of three types categorized by shape and size: large (leaf), granulated and fine. Mixing large (leaf) tea with fine and
4、 granulated tea shall not be allowed. Mixing fine tea with granulated tea shall be allowed. 1.2.2. Sifting and crumbs as components shall not be allowed except for single-use brew tea according to recipes. 1.2.3. Tea shall be subdivided into the following grades categorized by quality indicators: “B
5、ouquet”; premium; first; second; third. Official EditionReprinting is prohibited ! Standards Publishing House, 1990 -,-,- GOST 1938-90 p. 2 1.2.4. Organoleptic indicators of tea shall meet the requirements specified in Table 1. 1.2.5. No mold, fustiness, sourness, yellow tea dust, foreign odors, fla
6、vors and impurities in tea shall be allowed. 1.2.6. Physical and chemical indicators of tea shall meet the norms specified in Table 2. Table 2 Norm for tea by grades Name of indicator “Bouquet”premiumfirstsecondthird Moisture fraction of the total mass, %, no more than 8.0 Fraction of the total mass
7、 of water-soluble extractive substances, %, no less than3535323028 Fraction of the total mass of metallomagnetic impurity, %, no more than : in large and fine tea0.0005 in granulated tea0.0007 1.2.7. Blends of domestic and imported teas shall be produced under names not connected with the places of
8、growing domestic teas, or under numbers. 1.2.8. Breakage fraction of the total mass for all types and grades of tea, except for “Bouquet” shall be no more than 5%, for “Bouquet” it shall be no more than 1%. 1.2.9. Total ash fraction of the total mass in packaged tea shall be 48 %; the water- soluble
9、 ash fraction of the total mass shall be no less than 45% of total ash; the raw cellulose fraction of the total mass shall be no more than 19%. 1.2.10. Contents of toxic elements and pesticide residues shall not exceed the norms approved by the USSR Ministry of Health. 1.3. Packing 1.3.1. Tea shall
10、be packaged into soft or semi-rigid wrapper. Net weight of packs shall be 25, 50, 75, 100 125, 150, 200 and 250 grams; net weight of single-use bags shall be 2, 2.5 and 3 grams. Tea may be also packaged in artistically designed metallic, glass, wooden and other tea-caddies and boxes complying with t
11、he specifications and technical documentation; net weight of packing units shall be from 0.05 to 1.5 kg. By agreement with the customer, it shall be allowed to produce tea for enterprises of public catering in polyethylene film packs in accordance with GOST 10354, made from basic grades of polyethyl
12、ene permitted for contact with foodstuffs, or from cellophane in accordance with GOST 7730, glued with polyethylene film by net weight of 1 000 and 3 000 grams; packs for retail sale shall have net weight of 200, 300 and 500 grams until 01.01.96. Table 1 Characteristic of tea by grades Name of indic
13、ator “Bouquet”premiumfirstsecondthird Aroma and tasteComplete bouquet, delicate gentle aroma, pleasant strong astringent taste Gentle aroma, pleasant astringent taste Gentle enough aroma, medium astringent taste Insufficiently expressed aroma and astringency Weak aroma, weak astringent taste Brewed
14、teaBright, transparent, intensive, “better than medium” Bright, transparent “medium” Insufficiently bright, transparent, “medium” Transparent, “worse than medium” Insufficiently transparent, “weak” Color of brewed leaves Homogeneous, of brown-red color Insufficiently homogeneous, brown Non-homogeneo
15、us, dark brown. Allowed greenish tint Appearance of tea (plucking): leafEven, homogeneous, well rolled Insufficiently even, rolledUneven, insufficiently rolled fine Even, homogeneous, rolled Insufficiently even, rolled, with presence of lamellar teaUneven, lamellar granulated-Even enough, spherical
16、or oblong shape p. 3 GOST 1938-90 -,-,- GOST 1938-90 p. 4 1.3.2. Soft packaging shall consist of an internal section: low-grade wax paper in accordance with GOST 1760 or grade paper in accordance with GOST 1161 and external backed aluminum foil (backing is grade paper in accordance with GOST 1161) o
17、r polyvinylidene-chloride-coated paper of 102 grade; a paper label in accordance with GOST 7625 of the approved sample shall be subsequently stuck to the package. 1.3.3. Semi-rigid packaging shall consist of an internal section comprising backed aluminum foil (backing is grade paper in accordance wi
18、th GOST 1161) or low-grade wax paper in accordance with GOST 1760 or polyvinilydene-chloride-coated paper of 83 grade and an external box from A-1 grade paper in accordance with GOST 7247 or “khrom erzats” cardboard weighing 230 to 240 grams and 1 m2 in area in accordance with GOST 7933. 1.3.4. Pack
19、aging of single-use tea with net weight 2, 2.5 and 3 grams shall consist of an internal bag made from waterproof porous paper weighing 12 grams and 1 m2 in area or paper weighing 13 grams and 1 m2 in area or an internal and an external protective bag made from the label paper in accordance with GOST
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