Cotton New Standard Explanation 12 Question And Answer

One

Answer: the standard preface is a standard informative summary element, and is an essential element.

The preface in the standard consists of a specific part and a basic part.

The specific parts of the preface should give some important information about the standard, such as the structure of the standard. When the standard drawn is one of the series standards, the standard structure information should be clearly defined in the preface; the standard's marking level; the relationship between the standard and the previous standard; the major technical changes in the standard and the previous version; the specification and the nature of the appendix.

Compared with the original standard,

The preface of this standard highlights three important information.

First, according to the different processing methods of cotton (fine wool cotton), its quality requirements and inspection methods are different. Therefore, the GB1103-2007 standard is revised to GB1103.1 "first parts of cotton: sawtooth processed fine cotton" and GB1103.2 "cotton second parts: roller roller processing fine cotton"; two, the recommended clauses in the original standard are eliminated, the full text of the standard is mandatory, and three is the main content of the revision of the original standard.

The major changes include: the abolition of grades, the increase of color level, the quality index and quality of the mill, and the testing method; the restriction of "the length of the six or seven grade cotton is recorded as 25 millimeters"; the "25.0mm" limit of the grade of cotton should be tested according to the GB/T6498 test; the inspection of the samples should be carried out according to the test of the micron value; and the two samples of the cotton covered cotton are divided into the "weight inspection sampling" and the "quality inspection sampling".

2. what should the "Introduction" part of the standard pay attention to?

Answer: introduction is a standard optional summary element, it can be set or not.

In the past, people did not understand the function and content of the standard introduction, and often mixed the contents of the preface with the introduction.

In the preface of the standard, the significance of setting standards is introduced, and the standard establishment and compilation process are introduced.

This aspect should not be written into the standard preface, and should be included in the standard introduction if necessary.

The standard introduction mainly gives the following information: the reason for making the standard, the special information or explanation about the standard technical content.

Introduction is necessary in this standard.

The introduction mainly introduces the background of standard revision, and helps to understand the standard content and its characteristics of the standard users. Two, it shows that the revised standards are applicable to both sensory testing and instrumental inspection. It is necessary to conform to the actual conditions of China, and to make the instrumental testing as the direction of the cotton standard reform.

3. what is the scope of the standard?

Answer: scope is the essential element of standards.

The scope should clearly indicate the standard object and the various aspects involved, thereby specifying the applicable limits of the standard or its specific parts.

Therefore, the contents of the standard range mainly include two aspects: one is to define the object of the standard, that is, to set standards for what; the two is to explain all aspects involved, that is, the applicability of standards, or the applicable fields of standards.

GB1103.1 the first part of cotton: sawtooth processing fine staple cotton standard includes two parts: subject content and application scope.

The main contents are: the quality requirements, grading and grading requirements, inspection methods, inspection rules, inspection certificates, packing and marking, storage and pportation requirements of the fine toothed cotton with sawtooth processing are stipulated.

The scope of application includes: the standard object is the fine wool cotton with the saw tooth processing and the roller processing cotton; the suitable occasions are production, purchase, processing, trade, storage and use.

In terms of subject content and scope of application, it is clear that the object of this standard is fine toothed cotton with sawtooth processing.

4. what should we pay attention to normative reference documents?

Answer: one is the change of chapter titles.

Normative reference documents are the optional elements of standards.

This is determined according to the requirements of GB/T1.1-2009.

The way in which the documents listed in the standard should be quoted should be normative citation.

The so-called "normative citation" means that after the standard quotes the relevant documents, these clauses form an integral part of the standard, and the terms quoted are of the same force as the normative elements in the standard text.

In the use of standards, in order to meet the standards, in addition to comply with the normative content in the standard, we must comply with the cited clauses in the normative reference documents.

In addition, in addition to the standards, normative reference documents can also list other documents such as standardized guiding technical documents, regulations, procedures, etc.

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The two is the way of citing files.

The citation mode of normative citation is divided into "date reference" and "no date reference".

The date of reference refers to the use of only the date of the version, which is not applicable to the revised version, including the contents of the amendment list.

The non date referenced file means that the latest version of the file that is referenced is updated to its standard.

In general, the use of non date referenced documents is generally not used, because the way of reference is to ensure that the revised documents can still be applied to standards.

Therefore, only in the following two situations is the use of non date reference: first, according to the purpose of the standard, it can accept all the changes of the referenced documents in the future, and the two is data referenced documents.

The three is the change of the guide language.

According to GB/T1.1-2009 regulations, the guiding language of normative reference documents in the standard is: "the following documents are indispensable to the application of this document.

Any dated reference document is only applicable to this document.

The latest version (including all amendment lists) of the non dated reference documents is applicable to this document. "

The guiding language of this standard is based on this new regulation.

The four is the reference document of this standard.

The normative reference documents of this standard are the following 10 criteria: GB/T6102.1 raw cotton moisture regain test oven method; GB/T6102.2 raw cotton moisture regain test method resistance method; GB/T6103 raw cotton defect test method manual method; GB/T6498 cotton fiber "micron" test method; GB/ T6499 raw cotton impurity rate test method; GB6975 cotton packaging; GB/T8170 numerical revision rules and limit value expression and determination; GB/T13786 cotton classification room simulation daylight illumination; GB/T19617 cotton length test method hand pull ruler method; GB/T20392HVI cotton fiber physical properties test method.

Compared with GB1103-2007, the standard added two new standards, that is, the GB/T6103 "raw cotton defect test manual method" and "GB6975 cotton packaging".

The main reason for increasing the GB/T6103 "manual method for testing the raw cotton defects" is that the quality of the rolling mill has been taken as an independent quality index in this standard, and the quality standard of the rolling mill quality has been established, and the inspection method has been stipulated.

The determination of raw cotton defects is an important reference for making the physical standard of mill quality. This standard also lists the number of cotton defects with different grades of mill quality.

Therefore, the method is used to standardize the quality standard of rolling mill.

GB6975 cotton packaging standard was promulgated in 2007, later than GB1103-2007 release time, and the standard was adjusted from the original recommended standard to mandatory standard, resulting in GB1103-2007 being unable to quote.

Of course, GB6975 cotton packing as an independent mandatory standard, although GB1103-2007 does not quote, does not affect the independence and integrity of the two standards, nor does it affect the cotton market.

It needs to be pointed out that GB/T6102.2

Although the standard number is the same, the content of the standard has been greatly revised. The main reason is that the original standard is only applicable to a single type of electrical detector. After the quality inspection system reform, the moisture regain detection equipment and the moisture regain testing equipment for different links have been developed. Although the form is different, the principles adopted are all the same. They are all developed on the basis of comparison with the GB/T6102.1 oven drying method of raw cotton moisture regain test method. It is necessary to formulate a unified principle and method to standardize the manufacture and use of these moisture regain detection instruments, and ensure the accuracy of the important index of moisture regain. Test method for moisture regain "resistance method" is a test method for GB/T6102.2-2009 raw cotton moisture regain.

The GB/T8170 quoted in GB1103-2007 has been revised as "representation and determination of numerical revision rules and limit values" in 2008.

The reference documents in this standard are not dated, in order to enable their latest version to apply to this standard.

Because some of the standards in the normative reference document will also be formulated or revised in order to link up with the revision of this standard.

In addition, 9 of the 10 national standards cited are recommended standards. Since GB1103 is a mandatory standard, GB1103 standards are mandatory when using these reference standards.

5. what terms and definitions are there in this standard?

Answer: 14 terms and definitions are given in this standard.

Compared with the original standard, in addition to the 5 terms of gross weight, net weight, heterosexual fiber, foreign fiber content and harmful impurity of the foreskin cotton, the 2 terms of the public fixed weight and the cotton percentage of seed cotton were revised.

7 terms were added: color grade, white cotton, light spot cotton, light yellow cotton, yellow cotton, main color level and rolling quality.

Abolished the terminology of subject level.

6. what are the terms of the revision?

Answer: 2 terms have been revised for the fixed weight and the percentage of seed cotton.

The definition of the official weight in the original standard is that the weight is converted to the weight after the actual regain of cotton according to the actual moisture regain.

The so-called quasi weight is the weight of the net weight of cotton converted to the standard impurity rate according to the actual impurity content of the cotton. It solves the role of impurity content in the calculation of the weight.

But judging from the implementation of standards for several years, the quasi weight is basically no longer used, so it often does not calculate the quasi weight.

For the calculation of the weight, the calculation of the quasi weight is not necessary, especially the universal application of computer technology. The data of mixing impurity and moisture regain are substituted into the formula, so the calculation is very convenient.

Therefore, in this standard, the definition of the fixed weight is revised as follows: net weight is converted to the weight of the standard impurity rate and the moisture regain after the actual impurity rate and the actual moisture regain of the cotton.

The revision of seed cotton percentage is also based on the same consideration.

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7. what are the terms of the increase?

Answer: add 7 terms: color grade, white cotton, light spot cotton, light yellow dyed cotton, yellow dye cotton, main color level and rolling quality.

8. how to understand the color level and its type?

Answer: the color level is revised by the "color feature level" in the GB1103-2007 standard.

The concept of color characteristics has been put forward in the "cotton quality inspection system reform plan" approved by the State Council in 2003. It has been published in the GB1103-2007 as a recommended clause and has been implemented for nearly 6 years.

The designation of the color feature level is based on the color characteristics of the three grade "color characteristics, mill quality and maturity".

The term "color level" is revised to color level. It is mainly considered that "color level" is easy to understand and easy to popularize.

The color level is defined as the type and grade of cotton color.

The type is determined by yellow depth, and the level is determined by the degree of brightness.

The definition of the color characteristic level with the original standard is based on the classification of cotton color characteristics.

The level of reflectance (Rd) and yellow depth (+b) of cotton samples measured at the location of the cotton color characteristic map.

The difference is due to the fact that sensory testing does not need to determine the reflectance and yellowness of cotton. The color level is determined only according to the color level physical standard. The original definition is limited to the use of instrument test grading, and the new definition covers sensory inspection and instrument testing.

Cotton is divided into four types according to color: white cotton, light spotted cotton, light yellow cotton and yellow cotton.

Therefore, the definition of white cotton, light spot cotton, light yellow cotton and yellow cotton has been added to the standard.

The classification of these four types of cotton reflects the color characteristics of cotton types in different cotton regions in China.

9. what is the definition of "white cotton", "pale dirty cotton", "pale yellow dye" and "yellow dye cotton"?

Answer: white cotton is defined as white, milky white and grey cotton.

Spotted cotton is defined as cotton with slightly yellow or pale yellow spots in white.

Light yellow cotton is defined as: the color characteristics are manifested as yin or yellow in the whole.

Yellow dye cotton is defined as: cotton color characterized by yellowing cotton.

Considering that the color level is a new quality index, a brief description of four types of cotton meets the needs of sensory testing, and helps the standard users to understand and understand in depth.

In view of the influence of cotton varieties, climatic conditions, planting patterns, picking and processing methods, the accurate description of cotton type is very difficult and needs to be improved in future work practice.

10. how to understand the new term of "main color level"?

A: the main color level is the new term in the standard, mainly due to the existence of two tests according to batch inspection and packet inspection.

For packet inspection, each package has a color level result, so there is no concept of main color level for a single cotton bag.

However, in batch inspection, only 10% of cotton batches are taken for inspection. In order to ensure consistency of color level of batches of cotton, the main body color level needs to be set.

The color level of the main body is defined as: when the batch inspection is performed, it occupies a color level of 80% or more, and the rest color level is only adjacent to it, and the type is not more than 2, and the level is not more than 3.

The definition of the main color level mainly includes the following four meanings: one is for batches of cotton; two is for a batch of cotton, the main color grade of cotton is 80% and above; three is the rest of the color level should be adjacent to the main color level; four is a batch of cotton, including the main color level, the color level can not exceed 3, and the type can not exceed 2.

The determination of the color level of the main body needs to accurately grasp the concept of the adjacent color level, which is different from that of the original subject definition.

In the cotton color grading map, any color level can be calibrated by reflectance (Rd) and yellow depth (+b).

In 2-D space, adjacent cases include the upper and lower adjacent (see picture), left and right adjacent (see picture) and diagonal adjacent (see Figure) several situations.

For example, the color level adjacent to the white cotton grade three (31) includes white cotton grade two (21), white cotton four (41), light spot cotton grade 12 (12), pale cotton grade two (22), and the color grade adjacent to the pale cotton two grade (22), including white cotton 22 grade (22), white cotton grade (f), light spot cotton rank 1 (L), light spot cotton rank (L), light yellow cotton dyed cotton (grade 1), light yellow cotton dyed cotton (grade), yellow cotton dyed cotton (grade).

For ease of use, the table of adjacent color level corresponding to each color level is shown in Table 1.

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Table 1 color table and adjacent color level comparison table

If one color level of a batch of cotton does not occupy 80% or more, or the color level exceeds 3, or the color level type exceeds 2, or some color level is not adjacent to the main color level, the cotton will not have the main color level.

11. how to define the quality of rolling mill?

Answer: the quality of rolling mill is a new term in the standard, and also an important quality index of cotton. It is one of the three conditions of the original cotton grade.

The quality of rolling mill directly affects the quality of lint and yarn quality.

Therefore, it is necessary to increase the quality index and test method of the mill in the case of waste cotton grade.

The quality of rolling mill is defined as the rough appearance of the cotton lint and the type of defects contained after the seed cotton is processed.

That is to say, the quality of the rolling mill is a comprehensive judgement on the roughness of the appearance of lint and the type of defects in lint.

12. what are the terminology of cancellation?

Answer: this standard has been cancelled.

Accordingly, the terminology of cottonmodalgrade is cancelled.