1, cotton transaction method (1) Precise samples: Mainly used in West Africa and India. (2) Based on the large cargo in the port: After the cotton arrives in the bonded area, the quality of the large bulk of the cotton is confirmed on the spot. (3) U.S. General Standard: Mainly used in the United States and Brazil. U.S. General Cotton Standard: Grades are divided into GM, SM, M, SLM, LM, SGO, GO, BO (GM = Level 1 SM = Level 2 M = Level 3...) Fiber length classification: 2. Micronaire value The micronaire value of cotton fiber is a comprehensive reflection of fiber fineness and maturity. The micronaire value of cotton fiber can be used as a comprehensive index to evaluate the intrinsic quality of cotton fiber, which directly affects the color, strength, fineness, naturalness, elasticity, moisture absorption, and dyeing of fiber. The micronaire value is divided into three levels: A, B, and C. Level B is the standard level. 3. Moisture regain: Moisture regain is the percentage of water and fiber contained in cotton. The standard moisture regain of cotton is set at 8.5%. In the actual work, the regain rate of raw cotton is generally determined by the electrical detector method. 4. Inclusion rate: The national standard impurity rate of sawtooth cotton is 2.5%. 5, cotton has the following classification: (1) According to the physical form, cotton is divided into seed cotton and lint. The cotton that the cotton farmer removes from the cotton tree is called seed cotton, and the seed cotton is called lint after de-seeding. In the usual sense, cotton refers to lint. (2) According to length, cotton is divided into long-staple cotton and fine cotton, the length of fine cotton is generally 25-31 mm, and the length of long-staple cotton is 33 mm or more. China's cotton is mainly fine cotton. (3) According to processing machinery, cotton is divided into sawtooth cotton and roller cotton. The lint processed using a saw-toothed gin is a saw-toothed cotton. The lint processed using a ginner is called a roller-roller. At present, most cotton in China's cotton market is saw tooth cotton. (4) According to the different colors of cotton, cotton is divided into white cotton, yellow cotton, gray cotton and colored cotton. (5) According to different cotton grades, cotton is divided into high-grade cotton and low-grade cotton. 6, China's cotton inspection method: Mainly based on sensory tests, supplemented by instrument testing. Grade, length, foreign fiber, and neps are subject to sensory tests. Micronaire values, moisture regain, impurities, and short fiber rates are subject to instrumental tests. The order of inspection is: Sampling-recovery tidal rate-detection morbidity-sampling grade-reconstruction length-seizure horse clone value-exact fiber-test neps-examine short fiber rate. (8 items) 6. Imported cotton price calculation: Cotton CIF (yuan/ton) = cotton price (US$/lb) × exchange rate × 2204.62 × (1 + tariff) × (1 + 13% VAT) where tariffs are divided into tariff rates and customs tariffs The tariff within the tariff is 1%, and the tariff outside the tariff is 5%-40%.
Sodalite Gemstone Jewelry
Sodalite brings inner peace. Keep sodalite in your pockets and in every room of your house, so its peaceful properties will flow all around you.
Sodalite is a dark blue stone with white calcite interspersed. It is sometimes confused with Lapis Lazuli as it also has small specks of pyrite in it. The largest deposit of sodalite is in Brazil.
Sodalite is the stone of athletics, as it stimulates endurance. It is said sodalite will harmonize the inner being or the conscious and subconscious mind. Sodalite promotes peace and harmony. Sodalite is extra lucky for writers.
Sodalite is associated with the thyroid. It is perfect in a necklace. Wear it when you want to lose a few pounds. It helps in communicating and will give confidence to speak more.
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Sodalite Gemstone meaning
Healing properties of Sodalite
Teach you how to judge the quality of cotton?
The main assessment indicators of cotton quality: The main indicators are: grade, length, micronaire value, moisture regain, impurity rate, hazardous impurities.