National emblem
1Key Takeaways
This standard provides guidelines and specifications for the design, production, and usage of national emblems. It outlines detailed requirements for the dimensions, colors, materials, and methods of manufacturing to ensure consistency and quality in the representation of national symbols across various applications.
2Expert Interpretation
This in-depth analysis of the GB 15093-2025 national standard for the national emblem covers the technical changes, dimensional parameters, color specifications, material requirements, and the newly added 3D digital model. It also analyzes how the standard aligns with the National Emblem Law, providing professional guidance for the production, inspection, and digital application of the national emblem.
In-depth Interpretation and Implementation Guide of GB 15093-2025 National Emblem
GB 15093-2025 National Emblem, a national standard with high political significance and technical specifications, was officially released in 2025, replacing the old version from 2008. This revision is not only an update of technical parameters, but also an important milestone in the standardization and digitization process of national symbols. This article will provide a professional interpretation based on the standard document from multiple dimensions such as technical evolution, core requirements, and implementation applications.
I. Background and Technical Evolution Analysis of the Standard Revision
GB 15093 standard was first released in 1994, underwent its first revision in 2008, and this is its second revision. The core driving force for the revision stems from the newly implemented "National Emblem Law of the People's Republic of China" in 2021.
The new standard achieves seamless technical alignment with higher-level laws and regulations, while also making significant progress in measurement technology, materials science, and digital applications. The main technical changes reflect the following trends: **Strengthened Legal Compliance:** The standard explicitly uses the National Emblem Law and its annexes as the "basic basis," ensuring the consistency between technical specifications and legal provisions. The shape, pattern, and grid line drawing of the national emblem have all been updated according to the new law. **Scientific Terminology:** The term "national emblem yellow" has been changed to "national emblem gold," making the terminology more accurate and matching the color system description. Vague terms such as "center of the national emblem" have been removed, and a "basic basis" chapter has been added, making the standard structure clearer. **Refined Parameter System:** Dimensional parameters have evolved from general descriptions in the old version to a comprehensive system covering 60 specific geometric dimensions and permissible deviations, quantifying the dimensions, angles, and thicknesses of each component, including wheat and rice ears, Tiananmen Square, gears, and ribbons. **Modernized Measurement Technology:** The "Digital Technology Testing Method" has been introduced, allowing the use of calibrated 3D scanners for dimensional measurements, alongside the traditional "Measuring Tool Testing Method," reflecting the standard's acceptance of advanced manufacturing testing technologies. **Expanded Material and Color System:** In addition to fiber-reinforced plastics and aluminum alloys, "other compliant materials" have been added, reserving space for the application of new materials. Color parameters integrate dual calibration of the CIEXYZ color space and the Chinese color system (GB/T 15608), making color control more scientific and traceable. Digital Breakthrough: For the first time, a chapter on "3D Digital Model of the National Emblem" and a normative appendix have been added, marking the extension of the national emblem standard from physical specifications to digital asset specifications, providing a standard basis for the use of the national emblem in virtual scenes and digital media. II. Detailed Explanation of Core Technical Requirements 1. Components and Structural Decomposition of the National Emblem For the first time, the standard clearly defines in a normative appendix (Appendix A) that the national emblem is composed of 24 categories and a total of over 220 independent components. This is not only a scientific description of the complex structure of the national emblem, but also provides a precise checklist for production quality control and defect identification.
| Content Modules | Examples of Core Components | Quantity Requirements | Key Points of Quality Control |
|---|---|---|---|
| Five-Star and Tiananmen | Large Star, Small Star, Hip Roof, Gate Tower Columns and Corbels, Ornamental Columns, Golden Water Bridge, etc. | 13 types of components, precise quantity (e.g., 30 railings for the gate tower) | Clear patterns, complete structure, no missing or deformed parts |
| Gears | Gear Teeth | 16 teeth | Complete tooth shape, evenly distributed |
| Red Ribbon | Middle drooping ribbon, outer drooping ribbon, horizontal red ribbon, ribbon knot | Symmetrical left and right, total number determined | Smooth ribbon, no breakage, natural folds |
| Wheat and rice ears | Wheat and rice stalks, wheat grains, rice grains, leaves, leaf tips, irises | 98 wheat grains, 96 rice grains, fixed number of grains | Plump grains, orderly arranged, no adhesion |
2. Dimensional accuracy and geometric tolerance system
The standard specifies three general sizes: No. 1 (diameter 1000mm), No. 2 (800mm), and No. 3 (600mm). Non-general sizes need to be scaled proportionally.
The dimensional tolerance system is extremely rigorous: Key outline dimensions: For example, the horizontal diameter (D) and total height (H) are allowed deviations between ±1.7mm and ±2.5mm. Core pattern positioning dimensions: For example, the distance from the center of the large star (h) and the distance between the small star ring and the large star (r) are controlled within ±1.0mm to ±1.5mm. Subtle feature dimensions: For example, the width of the Tiananmen archway has a deviation of only ±0.5mm, ensuring a solemn and exquisite appearance from both near and far. Geometric tolerances: "Flatness" and "roundness" have replaced the old "unevenness" and "non-roundness," making the terminology more standardized. The flatness requirement for the emblem surface is the highest (1-2mm), ensuring uniform reflected light and a strong sense of solemnity.Measurement Methods: The standard provides two parallel measurement methods: the "gauge testing method" and the "digital technology testing method." The latter allows the use of equipment such as a 3D scanner to perform inspections through comparison of digital point cloud data, which is highly efficient and suitable for batch inspection and complex surface inspection.
3. Color and Surface Treatment Specifications
Color is a direct reflection of the solemnity of the national emblem.
The standard provides dual definitions for the color parameters of "National Emblem Red" and "National Emblem Gold":
| Color Name | CIEXYZ Color Space Parameters (D65, 10° Field of View) | Chinese Color System Notation (HV/C) | Allowable Error |
|---|---|---|---|
| National Emblem Red | Y10=7.5, x10=0.55, y10=0.34 | 7.2R 3.3/10.7 | △Y=±1.0, △x,y=±0.01 |
| National Emblem Gold | Y10=56.0, x10=0.39, y10=0.40 | 5.7Y 8.0/5.1 | △Y=±2.0, △x,y=±0.01 |
The paint film performance requirements are strict to ensure long-term hanging durability: 60° gloss must be greater than 90%, adhesion better than grade 2, pencil hardness ≥2H, and it must pass a series of accelerated aging tests such as weather resistance, water resistance, and salt spray resistance (refer to GB/T 1865, GB/T 1733, GB/T 10125, etc.).
4. Micromaterials and Mechanical Properties
Micromaterials have been expanded based on fiber-reinforced plastics and aluminum alloys. Its performance indicators are clearly defined: Bending strength: ≥140 MPa, ensuring no deformation under transportation, installation, and wind loads. Surface Barcol hardness: ≥30 HBa, guaranteeing surface scratch resistance. Drop ball impact: A 112g steel ball is dropped freely from a height of 1m three times, and the emblem shows no cracks, deformation, or delamination. This is a direct and rigorous toughness test. III. Innovative Highlights: 3D Digital Model of the National Emblem The "3D Digital Model of the National Emblem" added to Chapter 6 and Appendix C is the biggest highlight of this revision. It defines a three-dimensional digital technical file with parametric features, containing complete spatial relationships and dimensional information of the national emblem. **Significance and Applications:** **Design and Production Integration:** Provides a standard digital source for CAD/CAM production, ensuring geometric consistency of the national emblem produced by different manufacturers. **Digital Quality Inspection:** Point cloud data obtained from 3D scanning can be directly compared and analyzed with standard 3D models, enabling full-size automatic inspection. **Extended Application Scenarios:** Provides authoritative and standardized digital assets for the national emblem used in digital media such as film, television, games, virtual reality (VR), and augmented reality (AR), ensuring the seriousness and standardization of the national symbol in cyberspace and digital space. **Archival and Restoration:** Provides precise references for the digital archiving and restoration of precious historical national emblems. The model files can be accessed through the Chinese government website, ensuring official status and accessibility.
IV. Inspection Rules and Implementation Suggestions
1. Inspection Rule Framework
| Inspection Type | Triggering Conditions | Inspection Items | Judgment Basis |
|---|---|---|---|
| Factory Inspection | For each product leaving the factory | Articles 5.1 to 5.4 (Components, Dimensions, Appearance, Color) | All items must pass to be considered a qualified product |
| Type Inspection | When Material, Colorant, or Process Changes | All Technical Requirements in Chapter 5 | All items must pass to be considered a qualified type inspection product |
2. Implementation Recommendations for Manufacturing Enterprises
- Upgrade Design and Manufacturing Systems: It is recommended to introduce parametric design based on standard 3D digital models and equip them with testing equipment such as 3D scanners, colorimeters (compliant with GB/T 3979), and gloss meters (compliant with GB/T 9754) to simultaneously meet the requirements of both testing methods.
- Strict Supply Chain Management: For suppliers of red and gold paints, they must be required to provide color pastes or finished paints that comply with both CIEXYZ and the Chinese color system, and an incoming material color inspection procedure must be established.
- Improve Process Flow: For the 60 dimensional tolerances and strict flatness and roundness requirements, critical control points (CPs) must be set at each stage, including mold making, forming, and post-processing. **Standardized Product Labeling:** Strictly adhere to the requirements of Section 9.2, engraving a traceable product number and company information on the back of the emblem, and indicating the new requirements such as a 5-year validity period on the outer packaging and certificate of conformity. **3. Recommendations for Users and Regulatory Units** **Purchase and Acceptance Basis:** GB 15093-2025 should be clearly cited in the purchase contract, and the factory inspection report and certificate of conformity should be required documents for acceptance. **Installation and Maintenance:** Refer to the installation hole suggestions in Appendix B to ensure safe hanging. Store in a cool, dry place away from light and rain to ensure the long-term stability of the paint film and materials. **Digital Application:** When using the national emblem pattern or model in scenarios such as official websites, promotional videos, and digital exhibition halls, the 3D digital model published in the standard should be used first or referenced to ensure the standardization of the digital national emblem.
V. Summary and Outlook
The release and implementation of the national standard GB 15093-2025 "National Emblem" represents a significant upgrade in the standardization of my country's national symbols. It not only achieves a higher degree of refinement, scientific rigor, and quantification at the technical level, but also proactively lays out the application specifications for national symbols in the digital age by introducing 3D digital models.
The core value of the standard lies in its use of a complete, precise, and measurable technical language to solidify and guarantee the solemnity and sanctity required by the "National Emblem Law." From the size of a grain of wheat to the hue of a touch of gold, and to the coordinates of the entire three-dimensional digital space, the standard constructs a complete regulatory system from the physical world to the digital world, ensuring that the national emblem of the People's Republic of China appears in its most standardized and solemn form in any occasion and in any media.
For related industries, a deep understanding and strict implementation of this standard is not only a legal and technical requirement, but also a profound respect for and practical safeguarding of the national symbol.