JJF 1070-2023 PDF English
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Rules of Metrological Testing for Net Quantity of Products in Prepackages with Fixed Content
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Rules of metrological testing for net quantity of soap products in prepackages with fixed content
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Rules of Metrological Testing for Net Quantity of Products in Prepackages with Fixed Content
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The Rules of Metrological Inspection for Net Content of Prepackeged Commidity with Fixed Content
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JJF 1070-2023: Rules of Metrological Testing for Net Quantity of Products in Prepackages with Fixed Content
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JJF1070-2023
JJF
METEROLOGICAL TECHNICAL SPECIFICATION
Rules of metrological testing for net quantity of products in
prepackages with fixed content
[Including No.1 Amendment List (2024XG1)]
Issued on: OCTOBER 12, 2023
Implemented on: APRIL 12, 2024
Issued by. State Administration for Market Regulation
Rules of metrological testing for net quantity
of products in prepackages with fixed content
Under the jurisdiction of. National Legal Metrology Management Metrology Technical
Committee
Main drafting organization.
Qingdao Institute of Metrology
Beijing Institute of Metrology and Testing Sciences
Participating drafting organizations.
Measurement Department of the State Administration for Market Regulation
Shanghai Institute of Metrology and Testing Technology
Tsingtao Beer Co., Ltd.
The National Legal Measurement Management and Measurement Technical Committee
is entrusted to be responsible for interpretation of this Specification.
The main drafters of this Specification.
Wang Junguo (Qingdao Institute of Metrology)
Ma Xiaoyong (Beijing Institute of Metrology and Testing Sciences)
Yu Jingfen (Qingdao Institute of Metrology)
Zhao Yibin (Qingdao Institute of Metrology)
Participating drafters.
Lu Yankun (Measurement Department, State Administration for Market Regulation)
Qian Dading (Shanghai Institute of Metrology and Testing Technology)
Ma Zheng (Tsingtao Beer Co., Ltd.)
Replacing JJF 1070-2005
Table of Contents
Foreword... 5
1 Scope... 7
2 Normative references... 7
3 Terms and symbols... 7
4 Metrological requirements... 15
5 Requirements for metrological inspection... 22
6 Result evaluation and reporting... 28
Appendix A Random sampling method... 31
Appendix B General procedures for net quantity metrological inspection... 32
Appendix C Method to remove tare mass... 35
Appendix D Statistical principles of sampling control... 40
Appendix E Representation of T1 error and T2 error applications... 46
Appendix F Metrological inspection methods for products with net quantity marked in
mass (weight) units... 47
Appendix G Metrological inspection methods for products marked with net quantity in
volume units... 51
Appendix H Metrological inspection methods for products marked with net quantity in
units of length... 55
Appendix J Metrological inspection methods for products marked with net quantity in
units of area... 58
Appendix K Metrological inspection methods for products marked with net quantity in
counting units... 60
Appendix L Metrological inspection method of step-by-step screening sampling... 63
Appendix M Format of sampling sheet for metrological supervisory inspection of net
quantity of products in prepackages with fixed content... 72
Appendix N Original record format for metrological inspection of net quantity of
products in prepackages with fixed content... 75
Appendix P Format of net quantity metrological inspection report of products in
prepackages with fixed content... 78
Appendix Q Detailed sampling plan... 82
Appendix R Prohibition of misleading prepackages... 90
No.1 Amendment List (2024XG1)... 91
1 Scope
This Specification stipulates the measurement requirements for the net quantity of
products in prepackages with fixed content, metrological testing, as well as the
sampling, inspection, assessment activities in the metrological testing process.
This Specification applies to metrological supervision inspection and arbitration
inspection of the net quantity of products in prepackages with fixed content.
Commissioned inspections can be carried out with reference to this Specification.
Organizations that produce and sell products in prepackages with fixed content may
also conduct self-control inspections with reference to this Specification.
Products in prepackages with fixed content subject to metrological testing shall be
products that pass the manufacturer's self-inspection, or products imported and
distributed by the seller.
2 Normative references
This Specification makes reference to the following documents.
GB/T 10111 Generation of random numbers and procedures applied to sampling
inspection for product quality
For dated referenced documents, only the dated version applies to this specification; for
undated referenced documents, the latest version (including all amendments) applies to
this specification.
3 Terms and symbols
3.1 Terminology
3.1.1 Products in prepackages
The individual goods whose, before sale, contents are pre-packaged with packaging
materials or packaging containers, AND which have a predetermined value or
quantity (marked with net quantity).
Note.
1 "Products in prepackages" include products in prepackages marked with a uniform net
quantity (products in prepackages with fixed content) and products in prepackages marked
with a random net quantity.
2 The actual quantity of the product shall not be changed without damaging the packaging
of the product. However, the actual quantity of some products in prepackages may change,
due to factors such as water loss after packaging.
3.1.2 Products in prepackages with fixed content
Products in prepackages which, for the purpose of sales, have unified mass, volume,
length, area, count labeling and other identification contents, within a certain
quantitative limit.
Note. Excluding drugs and hazardous chemicals.
3.1.3 Same kind products in prepackages with fixed content
Products in prepackages with fixed content, which are produced by the same
manufacturer in the same variety, nominal quantity, packaging specifications,
packaging materials.
3.1.4 Net quantity
Products in prepackages with fixed content refer to the quantity of goods inside after
removing packaging containers and other packaging materials.
Note. Neither the packaging materials of the product nor any other materials packaged with
the product shall be included in the net quantity.
3.1.5 Nominal quantity
The net quantity of the product, as stated by the manufacturer or seller on the
packaging (or label) of the products in prepackages with fixed content.
3.1.6 Label
A carrier used by producers or sellers to convey information about products in
prepackages with fixed content to consumers, marking, identifying or explaining the
goods and packaging in the form of writing, printing or graphics.
3.1.7 Principal display panel
The panel to display the product name, when products in prepackages with fixed
content are sold normally.
Note. Usually the principal display panel is located at the principal position or in front of
products in prepackages with fixed content; the product may have multiple principal display
panels.
4.2.1.3 Selection of measurement units and marking categories
The legal unit of measurement for the net quantity marking shall be selected according
to the marking category and quantity limit of the product in Table 1.
The selection of net quantity marking categories (methods) for products in prepackages
with fixed content shall be based on consumers’ usage and trade habits, with the purpose
of providing consumers with clearer and more accurate net quantity information.
Generally, solid products, gas products or liquefied gas products are marked in mass
units. Liquid products are marked in volume units, or mass units. Semi-solid or semi-
liquid products are marked in mass units, or volume units. For counting marked
products, the net quantity marking shall be clearly identifiable, such as "50 pieces",
"100 pieces", "3 pieces". For products marked in units of volume, length, area, the
marked net quantity shall be the amount of the product at a reference temperature of
20 °C. For the amount of frozen products, the temperature shall be based on the
temperature required by the manufacturer to maintain the stability and usability of the
product. Normally there is no need to mark the reference temperature.
4.2.1.4 Significance of net quantity marking
The net quantity marking shall be marked in a clearly visible bold font, in a prominent
position on the principal display panel of the product package or on the product label,
which is clearly different from the background color of the product package. The
minimum height of the net quantity marking characters shall comply with the provisions
of Table 2.If the net quantity is embossed or molded on the surface of the product
packaging container, the net quantity information shall be clearly visible and easy to
read and understand.
4.2.2 Labeling of multiple product packaging
If the same package contains multiple products in prepackages with fixed content (the
package has not been removed at the time of retail sale), in addition to the labeling of
the individual goods meeting the requirements, the labeling of the package shall also
meet the following requirements.
a) If the same package contains multiple pieces of the same products in prepackages
with fixed content, the net quantity of the single products in prepackages with
fixed content and the total number of single products, or the total net quantity,
shall be marked. For example. "Net quantity. 200 grams (40 grams × 5)" or "Net
quantity. 40 grams × 5 pieces".
b) If the same package contains multiple pieces of different types of products in
prepackages with fixed content, the net quantity of a single piece of various
different types of products in prepackages with fixed content and the number of
pieces of various different types of products in prepackages with fixed content
shall be marked, OR the total net quantity of various different types of products
in prepackages with fixed content shall be marked separately. For example, "Net
quantity. 200 grams (Product A 40 grams × 3, Product B 40 grams × 2)" "Product
A net quantity. 100 grams; Product B net quantity. 50 grams × 2; Product C net
quantity. 50 grams".
Note. When the pre-package contains multiple products in prepackages with fixed content,
if the package is completely transparent and consumers can clearly identify the number of
products in prepackages with fixed content in the package and the nominal quantity of a
single product, it is not mandatory to mark the net quantity on the package.
5 Requirements for metrological inspection
5.1 General
5.1.1 Sampling and metrological inspection methods
Metrological supervisory inspection on the net quantity of products in prepackages with
fixed content shall be carried out in strict accordance with the requirements and
procedures of this Specification.
If the metrological inspection of net quantity is carried out by sampling method,
sampling shall be carried out in accordance with the sampling method specified in
Appendix A of this Specification, at the production and packaging sites, import,
distribution, wholesale transactions, sales links of products in prepackages with fixed
content.
Metrological inspection shall be carried out on various types of products with different
labeling methods, in accordance with the inspection methods specified in Appendix B,
Appendix F to Appendix K of this Specification. For products in prepackages with fixed
content where there is no metrological inspection methods in this Specification, it shall
be implemented in accordance with corresponding international standards, national
standards or other methods prescribed by the State Administration for Market
Regulation.
5.1.2 Homogeneity of products and samples
Sampling an inspection batch shall ensure that all products in prepackages with fixed
content in the inspection batch have equal sampling probability.
If sampling is done at the production or packaging site, the inspection batch shall be all
products in prepackages with fixed content on the production line, that have not been
rejected by the inspection system. The samples taken must be self-inspection qualified
products after packaging inspection in the final packaging process.
During the sampling process, in addition to normal operating adjustments or correction
measures for the production line, abnormal operating adjustments or corrections to the
filling or inspection process of the production line shall be prohibited.
5.1.3 Measurement uncertainty
The expanded uncertainty of measuring instruments and metrological inspection
methods, which are related to determining the actual quantity inspection results of
products in prepackages with fixed content, shall not exceed 0.2T (k = 2).
Factors that affect the uncertainty of metrological inspection results include the
maximum allowable error and repeatability of the measuring instrument, changes in
packaging materials, density fluctuations caused by differences in the amount of solids
in the liquid or temperature changes, etc.
5.1.4 Net quantity inspection of inspection batches
5.1.4.1 Regardless of whether the sampling inspection method is used to determine the
compliance of the inspection batch, each metrological testing of the net quantity of the
product shall include the following three parameters.
a) The average actual quantity of products in prepackages with fixed content in the
inspection batch;
b) The number of T1 inadequate prepackages among the products in prepackages
with fixed content in the inspection batch;
c) Whether the inspection batch of products in prepackages with fixed content has
T2 inadequate prepackages.
Note. For inspection batches sampled in the retailer's warehouse and retail site (5.2.1c), and the
batch size is within 10 pieces, there is no requirement for the average actual quantity.
5.1.4.2 Impact of other factors on net quantity
When carrying out metrological inspection on the net quantity of products in
prepackages with fixed content, reasonable changes in the net quantity of products that
may be caused by environmental conditions, such as storage and transportation, shall
be fully considered.
Usually, products in prepackages with fixed content are stored and transported under
ambient conditions of normal temperature and humidity. Such an environment may
cause the actual quantity of the packaged goods to change. Therefore, when evaluating
the average actual quantity of the goods and the actual quantity of a single product, for
products whose net quantity changes greatly due to factors such as changes in the
moisture content of the product, such as soap, wheat flour, rice and other products,
manufacturer shall take measures to ensure the accuracy of the net quantity of the
product under specified conditions. In principle, the market supervision department's
metrological supervisory inspection of such products in prepackages with fixed content
shall be carried out at the production site, OR the metrological inspection shall be
carried out using the special methods specified in the series of specifications for the
measurement and inspection of the net quantity of products in prepackages with fixed
content.
Note. This Article does not apply to products in prepackages with fixed content packaged in
sealed packaging materials.
5.1.4.3 Assessment of net quantity of inspection lots
Three parameters shall be considered for whether an inspection lot is qualified
(acceptable) or unqualified (rejected) (refer to Appendix D for the statistical principles
of sampling control).
a) If an inspection lot meets the requirements of the following three parameters, the
inspection lot is acceptable (qualified).
- The average actual quantity of the products in prepackages with fixed content
in the inspection batch is greater than or equal to its nominal quantity;
- Among the products in prepackages with fixed content in the inspection batch,
the number of category T1 inadequate prepackages does not exceed the
quantity specified in Table 4;
- There are no T2 inadequate prepackages among the products in prepackages with
fixed content in the inspection batch.
b) If one of the above three parameters of an inspection lot does not meet the
requirements, the inspection lot will be deemed unqualified.
5.2 Sampling control of inspection lots
The metrological inspection for acceptance (pass) or rejection (failure) of an inspection
lot shall be conducted on the basis of random sampling.
5.2.1 Determine inspection lot
The batch size determination of inspection lots is divided into the following three
situations.
5.2.2 Measurement requirements for inspection batches
5.2.2.1 Requirements for average actual quantity
For each inspection batch, the average actual quantity of products in prepackages with
fixed content shall be greater than or equal to its nominal quantity.
If an inspection lot meets the requirements of this Article, the probability that the
inspection lot is mistakenly rejected (erroneously assessed as unqualified) will not
exceed 0.5%. If the average actual quantity of the inspection lot is less than (Qn - 0.74σ),
the probability that it is correctly rejected (correctly assessed as unqualified) is at least
90%.
If the average actual quantity of samples of an inspection batch is less than its nominal
quantity minus its correction value [see formula (1)], then the inspection batch shall be
assessed as unqualified.
5.2.2.2 Requirements on the actual quantity of a single product
The actual quantity of a single product in prepackages with fixed content shall
accurately reflect its nominal quantity. If there is an inadequate of the actual quantity of
a single product, the inadequate shall meet the requirements of 4.3.1.
a) Single piece of category T1 inadequate prepackages
If the number of category T1 inadequate prepackages in an inspection batch is greater
than the quantity specified in Table 4, then the inspection batch shall be assessed as
unqualified.
① This Article can ensure that if an inspection batch contains no more than 2.5%
of category T1 inadequate prepackages, then the probability of the inspection
batch being accepted (evaluated as qualified) through the sample metrological
testing is at least 95%; the probability of being incorrectly rejected (incorrectly
assessed as unqualified) does not exceed 5%.
② This Article can also ensure that if an inspection batch contains 9% of
category T1 inadequate prepackages and category T2 inadequate prepackages,
the probability of the inspection batch being correctly rejected (correctly
assessed as unqualified) is at least 90%.
Note. Since the number of pieces of goods can only be integers, if the number of pieces of
goods calculated according to the above requirements (such as 2.5% and 9%) has decimals,
the number of pieces with decimals needs to be rounded up, so the above conditions where
the percentage (such as 2.5% and 9%) are not strictly applied is allowed.
b) Single piece of category T2 inadequate prepackages
If any one or more category T2 inadequate prepackages appear in an inspection batch,
the inspection batch shall be assessed as unqualified.
The category T2 inadequate prepackages shall not appear in the samples taken.
5.3 Inspection batches for metrological inspection
The products in the inspection batch must be products that have passed the
manufacturer's self-inspection, or products that are already in the sales field. The
inspection batch size shall be determined according to the three conditions specified in
5.2.1.
5.4 Implementation of metrological inspection
5.4.1 General
The following steps shall be carried out for metrological inspection of the net quantity
of products in prepackages with fixed content.
1) Determine the inspection batch;
2) Search sampling plan;
3) Take samples;
4) Inspect samples.
5.4.2 Determine inspection batch
The products used as inspection batches shall be products that have passed the
manufacturer's self-inspection, or products in the sales field. Determine the batch size
of the inspection batch according to the requirements of 5.3.
5.4.3 Search sampling plan
Search the sampling plan according to Table 4 according to the inspection batch size.
If the inspection batch size is not the typical value in Table 4, the sampling plan shall
be retrieved according to Appendix Q, to determine the sample size and the indicators
for evaluating the sample. When selecting the sampling plan in Appendix Q, pay
attention that there shall not be any category T2 inadequate prepackages.
5.4.4 Take samples
Random sampling method shall be used to select samples from the inspection batch;
the sampled products shall meet the corresponding requirements of the single product.
The sampling method shall ensure that the possibility of each product being selected as
a sample is as equal as possible. The sampling process shall be coordinated and
confirmed by personnel from the party being sampled. See Appendix A for the specific
random sampling method.
After sampling for metrological supervision and inspection, a sampling form for
metrological supervisory inspection of products in prepackages with fixed content shall
be filled in (see Appendix M for the format of the sampling form).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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