Some Suggestions For Wool Inspection

by wool The quality of wool is closely related to the production. test The following are the details. proposal For reference only:

1, we find that many trade contracts are too simple in making relevant quality clauses and quality requirements. In the commodity specifications, there are only kinds of wool without any quality indicators. Some of them are specified in a larger numerical range in terms of quality indicators, such as fiber diameter 16.5~40Mic, wool cluster length 3~5 inches, and so on, and the average value of the delivery lot is not determined, which makes it impossible to assess whether the goods are qualified or not.

2. The average fiber length in a large number of carbonized wool contracts is defined as the average length index of fat bearing wool, and how the actual length of carbonized wool is used to evaluate the average length of fat bearing wool? In fact, it is two different length indexes, the former is the average length of single fiber dimension, the latter is the average length of wool cluster, because there are too many complex factors, it is difficult to reasonably convert the two.

3. The average length of some fat containing wool contracts is stipulated as haute length (60Hmm). Our understanding is that the length of the sliver wool after washing is cleaned. According to the IWTO rule, it is the average length of fiber obtained after washing, carding and combing. It is a theoretical calculation length deduced from the "additional test and evaluation test (TEAM)". According to the test results of the length and strength of the wool cluster and the results obtained by combining the washing rate, the plant impurity base and the average fiber diameter, the theoretical haute length obtained by adding the processing calibration coefficient of the factory can be obtained. Once the length of the theoretical haute is part of the contract, should the specified formula be specified in the contract, which is convenient for acceptance and inspection.

4, due to the different quality and style of the wool produced by different countries, such as the grade of the fat bearing wool, especially for the mixed type fat bearing wool, the contract should be restricted by the gross content of all kinds of defects or replaced by transaction samples; the appearance defects of the wool and carbonized wool (yellow pollution wool, felt wool, short hair and colored wool) and the defects of wool strip [wool, wool, colored wool, Medullated Wool) and dried Kempy (Kempy Wool)] must be specified in the contract. {page_break}

5. The method of measuring the average diameter of wool fiber is usually: projection microscope, airflow instrument, laser fiber diameter analyzer and optical fiber diameter analyzer (OFDA method). At present, most of the applications are the airflow meter method and the laser fiber diameter analyzer. In this case, it is especially necessary to point out that in the imported lambs and wool containing more pulp hair, the airflow meter method is used to test the average fiber diameter of the two kinds of wool. The results obtained are much smaller than that of the projection microscope. For the test of lamb, the maximum difference between the two fibers obtained by the two methods is 6.7%. For the tests of wool containing more hair, the difference between the two methods on the wool size of 35 m is greater than that of the 35 m. For this reason, it is recommended that the test results of the airflow method should not be used when buying 35 micron m and known to have many pulp hairs. Specific testing methods can be specified in the contract, such as laser fiber diameter analyzer and optical fiber diameter analyzer.

6. With the increase in the number of imported wool countries, the methods and methods of weight settlement for imported fat bearing wool are also different. There are already imported fur containing wool using the French (Schlumberger) or British (Noble) tops and combed wool business as the final delivery weight. It is suggested that the standard regain, standard fat content and combing rate in the trade contract must be marked in the trade contract, when the French, British wool and combed wool are used as the final settlement weight, so that the goods can be correctly applied in the acceptance of the goods.

7. In recent years, inspection reports (Report) have been found to replace inspection certificates (Certificate) to be provided to inspection bodies for inspection and declaration. Most inspection reports have remarks on the test results issued (generally below the inspection report), indicating the source of samples (i.e. customer samples), indicating that the test results are only responsible for the samples. For this reason, we hope that the importers concerned will pay special attention to this situation when they receive inspection certificates or inspection reports. In the actual wool inspection work, we have found that there are lots of such cases. As long as the inspection reports are provided, the quality of the test results is quite different from the quality of the goods delivered. In other words, the test results provided in the inspection report are not the quality of the goods arrived at. What is more, we find that there are immoral behaviors in forging inspection certificates. We must pay enough attention to this and resolutely prevent such situations from happening again.