GB/T 22838.3-2025Determination of physical characteristics for cigarettes and filter rods - Part 3: Circumference - Non-contact optical method (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 3 of GB/T 22838 "Determination of Physical Properties of Cigarettes and Filter Rods". GB/T 22838 has been published with the following...

part.

---Part 1: Cigarette Packaging and Labelling;

---Part 2: Length Photoelectric Method;

---Part 3: Circumferential Non-Contact Optical Methods;

---Part 4: Cigarette Quality;

---Part 5: Cigarette draw resistance and filter pressure drop;

---Part 6: Hardness;

---Part 7: Cigarette Dust Content;

---Part 8: Moisture Content;

---Part 9: Empty Cigarette Ends;

---Part 10: Bursting Mouth;

---Part 11: Cigarette Extinguishing;

---Part 12: Cigarette Appearance;

---Part 13: Filter Rod Roundness;

---Part 14: Filter Rod Appearance;

---Part 15: Definition and Measurement Principle of Cigarette Ventilation;

---Part 17: Measurement of tobacco shreds falling from the end of a cigarette using the vibration method.

This document replaces GB/T 22838.3-2009 "Determination of Physical Properties of Cigarettes and Filter Rods Part 3: Circumferential Laser Method", and is consistent with...

Compared with GB/T 22838.3-2009, apart from structural adjustments and editorial changes, the main technical changes are as follows.

a) The scope of application has been changed (see Chapter 1, Chapter 1 of the 2009 edition);

b) The terms and definitions of "diameter" and "relative ellipticity" have been changed (see 3.1, 3.8; 3.1, 3.5 in the 2009 edition);

c) Six terms and definitions have been added. "convex cross section," "perimeter," "circumference," "relative roundness," "circumferential standard bar," and "reference standard bar" (see [link]).

3.2~3.4, 3.9~3.11);

d) The relevant content of the principle has been changed (see Chapter 4, Chapter 4 of the 2009 edition);

e) Added relevant content on experimental conditions (see Chapter 5);

f) Changes were made to the relevant information regarding instruments and equipment (see Chapter 6, Chapter 5 of the 2009 edition);

g) The relevant content regarding the test sample conditioning conditions record has been deleted (see 7.1 in the 2009 edition);

h) The calibration method has been changed (see 8.2, 7.2 in the 2009 version);

i) The relevant test content has been changed (see 8.3, 7.3 in the 2009 version);

j) The relevant content regarding the presentation of results has been changed (see Chapter 9, Chapter 8 of the 2009 edition);

k) Changes were made to the content related to repeatability and reproducibility (see Chapter 10, Chapter 9 in the 2009 edition);

l) The relevant content of the test report has been revised (see Chapter 11, Chapter 10 of the 2009 edition);

m) The material and accuracy requirements for the circumferential standard bar have been changed (see D.1, A.1 in the 2009 edition).

This document is modified to adopt ISO 2971:2013 "Determination of nominal diameter of cigarettes and filter rods - non-contact optical method".

This document has undergone the following structural adjustments compared to ISO 2971:2013.

---Chapter 6 corresponds to Chapter 5 in ISO 2971:2013;

---Chapter 7 corresponds to Chapter 6 in ISO 2971:2013;

---Chapter 8 corresponds to Chapter 7 in ISO 2971:2013;

---Chapter 9 corresponds to Chapter 8 in ISO 2971:2013;

---Chapter 10 corresponds to Chapter 9 in ISO 2971:2013;

---Chapter 11 corresponds to Chapter 10 in ISO 2971:2013;

---Appendix A corresponds to Appendix D in ISO 2971:2013;

---Appendix B corresponds to Appendix E in ISO 2971:2013;

---Appendix C corresponds to Appendix B in ISO 2971:2013;

---Appendix D corresponds to Appendix A in ISO 2971:2013;

---Appendix E corresponds to Appendix C in ISO 2971:2013.

The technical differences between this document and ISO 2971:2013, and the reasons therefor, are as follows.

---The definition of "circumference" has been changed (see 3.4), clarifying the value of pi when converting between diameter and circumference, in order to improve the conversion results.

Accuracy;

---Two new terms and definitions have been added. "circumferential standard bar" and "reference standard bar" (see 3.10 and 3.11) to clearly define and standardize the circumference.

The relevant concepts of standard bars;

---Added content related to atmospheric conditioning and testing (see Chapter 5) to clarify test condition requirements;

---Added relevant content on circumferential standard bars (see 6.2) to clarify the relevant requirements for circumferential standard bars;

---The section on test sample conditioning conditions (see section 8.1 of ISO 2971:2013) has been removed to avoid conflict with test report requirements.

repeat;

---The calibration method has been changed (see 8.2) to clarify the relevant requirements for instrument calibration;

---The testing-related content has been modified (see 8.3) to clarify the requirements for the circumference test;

---The relevant content regarding the representation of results has been modified (see Chapter 9) to ensure consistency with relevant national standards and to meet the requirements of my country's circumference measurement standards.

Practical requirements;

---The content that test reports should include has been expanded (see Chapter 11) to align with GB/T 22838.5-2024.

The following editorial changes have been made to this document.

---To harmonize with existing standards, the standard title has been changed to "Determination of Physical Properties of Cigarettes and Filter Rods Part 3: Circumferential Non-contact..." Optical Methods;

---The definition of relative roundness (see 3.9) is changed from "100 minus relative ellipticity" to "100% minus relative ellipticity";

---The formula for the average apparent diameter of the cross-section (see Appendix C) is derived from "Dm=2piintegral 2pi "D(alpha)dalpha" should be changed to "Dm= 2piintegral 2pi D(alpha)dalpha".

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the State Tobacco Monopoly Administration.

This document is under the jurisdiction of the National Tobacco Standardization Technical Committee (SAC/TC144).

Introduction

The physical properties of cigarettes and filter rods are important indicators for evaluating the quality of cigarette production and processing. GB/T 22838 "Physical Properties of Cigarettes and Filter Rods" the "Determination of" consists of the following 16 parts, depending on the detection object and detection method.

---Part 1: Cigarette Packaging and Labelling. The purpose is to specify the methods for determining cigarette packaging labelling and cigarette packaging.

---Part 2: Length Photoelectric Method. The purpose is to define a photoelectric method for measuring the length of cigarettes and filter rods.

---Part 3: Circumferential Non-Contact Optical Methods. The purpose is to define the non-contact optical determination of the circumference and ellipticity of cigarettes and filter rods.

method.

---Part 4: Cigarette Quality. The purpose is to specify the methods for determining cigarette quality.

---Part 5: Cigarette Draw Resistance and Filter Pressure Drop. The purpose is to specify the methods and standards for measuring cigarette draw resistance and filter pressure drop.

condition.

---Part 6: Hardness. The purpose is to specify the method for determining the hardness of cigarettes and filter rods.

---Part 7: Cigarette Dust Content. The purpose is to specify the method for determining the cigarette dust content.

---Part 8: Moisture Content. The purpose is to specify the method for determining the moisture content of cigarettes and filter rods.

---Part 9: Cigarette Empty Ends. The purpose is to specify the method for determining cigarette empty ends.

---Part 10: Burst Mouth. The purpose is to specify the method for determining the burst mouth of cigarettes and filter rods.

---Part 11: Cigarette Extinguishing. The purpose is to specify the method for determining cigarette extinguishing.

---Part 12: Cigarette Appearance. The purpose is to specify the methods for determining the appearance of cigarettes.

---Part 13: Filter Rod Roundness. The purpose is to specify the method for determining the roundness of filter rods.

---Part 14: Filter Rod Appearance. The purpose is to specify the method for measuring the appearance of filter rods.

---Part 15: Definition and Measurement Principle of Cigarette Ventilation. The purpose is to specify the method for measuring cigarette ventilation.

---Part 17: Measurement of Tobacco Droppings at the End of Cigarettes (Vibration Method). The purpose is to specify the vibration method for measuring tobacco droppings at the end of cigarettes.

Measurement method.

The aforementioned documents clearly define the scope of application, terminology, testing equipment, and procedures, and have undergone repeated testing and verification by multiple laboratories.

The test provides precision data, enhancing the consistency and comparability of experimental results and providing a scientifically rigorous basis for the detection of physical properties of cigarettes and filter rods.

The standardization basis.

This document is a revision of ISO 2971:2013; this is the first revision of GB/T 22838.3, adding new measurement methods and the new testing equipment refines the metrological technical requirements for testing equipment, improves the consistency between Chinese standards and ISO standards, and can provide services for cigarettes and...

We provide scientific and accurate technical means for the quality testing of filter rod products.

Determination of the physical properties of cigarettes and filter rods Part 3: Circumferential Non-Contact Optical Methods

1 Scope

This document describes a non-contact optical measurement method for the circumference of cigarettes and filter rods, and specifies the standard conditions for the measurement.

This document applies to the determination of the circumference of cigarettes, filter rods, and cylindrical tobacco products similar to cigarettes.

Note 1.Non-contact measurement techniques are detailed in Appendix A.

Note 2.Contact or pneumatic measurement methods are alternative methods for determining the nominal diameter of cigarettes and filter rods (see Appendix B) and are not within the scope of this document.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values Note. GB/T 16447-2004 Atmospheric environment for conditioning and testing of tobacco and tobacco products (ISO 3402:1999, IDT) ISO 5725-2 Accuracy (correctness and precision) of measurement methods and results - Part 2: Determining the repeatability of standard measurement methods mentmethod] Note. GB/T 6379.2-2004 Accuracy (Correctness and Precision) of Measurement Methods and Results - Part 2: Determining the Repeatability and Reproducibility of Standard Measurement Methods Basic methods for current status (ISO 5725-2:1994, IDT)

3 Terms and Definitions

The following terms and definitions apply to this document.

diameterdiameter

This document specifies the arithmetic mean of n diameter readings for a given sample under the specified method.

Note. Measurement results may be affected by n (the number of readings used).

convex cross section A cross section in which a straight line between any two points is also contained.

perimeter

The length of the boundary line of the specimen cross section.

Note. If the cross-section of the sample is not circular, the estimated perimeter will have an error, which increases with the increase of ellipticity.