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Organic-electrochromic laminated glass used in buildings
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GB/T 45921-2025
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Basic data | Standard ID | GB/T 45921-2025 (GB/T45921-2025) | | Description (Translated English) | Organic-electrochromic laminated glass used in buildings | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q33 | | Classification of International Standard | 81.040.30 | | Word Count Estimation | 23,292 | | Date of Issue | 2025-06-30 | | Date of Implementation | 2026-01-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 45921-2025: Organic-electrochromic laminated glass used in buildings---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/GBT45921-2025
ICS 81.040.30
CCSQ33
National Standard of the People's Republic of China
Organic electrochromic laminated glass for buildings
Released on June 30, 2025
Implementation on January 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Requirement 2
4.1 General Principles 2
4.2 Appearance quality of discolored area 2
4.3 Dimensional deviation 3
4.4 Visible light transmittance in the color changing area 3
4.5 Total solar transmittance in the color changing area 4
4.6 UV transmittance of discolored area 4
4.7 Other optical properties of the color-changing area
4.8 Conversion Time 4
4.9 Color uniformity of discolored area 5
4.10 Power Limit 5
4.11 Insulation resistance 5
4.12 Temperature and humidity durability 5
4.13 Radiation durability 5
4.14 Cyclic durability 5
5 Test methods 5
5.1 General Principles 5
5.2 Appearance quality of discolored area 6
5.3 Dimensional deviation 6
5.4 Visible light transmittance in the color changing area 7
5.5 Total solar transmittance in the color changing area 8
5.6 UV transmittance of discolored area 8
5.7 Other optical properties of the color-changing area 8
5.8 Conversion Time 9
5.9 Color uniformity of discolored areas 11
5.10 Power Limit 12
5.11 Insulation resistance 13
5.12 Temperature and humidity durability 13
5.13 Radiation durability 14
5.14 Cyclic durability 14
6 Inspection Rules 15
6.1 Inspection categories 15
6.2 Factory Inspection 15
6.3 Type inspection 16
7 Packaging, labeling, transportation and storage 17
7.1 Packaging 17
7.2 Sign 17
7.3 Transportation 18
7.4 Storage 18
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed by China Building Materials Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Architectural Glass (SAC/TC255).
This document was drafted by. China National Testing Holding Group Co., Ltd., Guangyi Intelligent Technology (Suzhou) Co., Ltd., Jiangsu Xiuqiang
Glass Craft Co., Ltd., China Building Materials Science Research Institute Co., Ltd., Niruo (Jiangsu) Electronic Technology Co., Ltd., Qinhuangdao
Glass Industry Research and Design Institute Co., Ltd., Yilai Chuang (Beijing) Intelligent Materials Technology Co., Ltd., Zhuhai Haifa Xingye New Materials Technology Co., Ltd.
Tianjin Yaopi Engineering Glass Co., Ltd., Chongqing Youyou Lihong Glass Co., Ltd., Zhongli Glass Co., Ltd., Ningbo Niruo Electronic Technology Co., Ltd.
Co., Ltd., Building Materials Industry Technology Information Research Institute, and China Building Materials Inspection and Certification Group Qinhuangdao Co., Ltd.
The main drafters of this document are. Ding Zuoxin, Li Junjie, Li Huanhuan, Huo Yongchen, He Jiazhi, Meng Zheng, Hu Keyin, Hu Haohua, Song Xingwang,
Li Guozhang, Shi Lin, Huang Di, Wei Nana, Liu Chengxiong, Jia Lidan, Sun Zhao, Yang Xuedong, Xu Wei, Yang Shuwei, Yang Guixiang, Wang Xin, Wu Qin, Tian Li,
Wang Meili, Du Peng, Yang Liyong, Su Lili, Guo Jianbao, Zhang Hongyuan, Li Jiaying, Li Zhi, Feng Chunyan, Cheng Jianfei, Cao Zhenhu, Yu Hongliang, Liu Yuanmiao,
Bao Ji, Zhang Rui, Tu Hao, Li Ming, and Wang Peikai.
Organic electrochromic laminated glass for buildings
1 Scope
This document specifies the requirements, test methods, inspection rules, and packaging, marking, transportation and
Storage.
This document applies to the design, production and delivery of organic electrochromic laminated glass for architectural use.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 191 Pictorial symbols for packaging, storage and transportation
GB/T 2680 Visible light transmittance, direct sunlight transmittance, total solar energy transmittance, ultraviolet light transmittance and other properties of architectural glass
Determination of parameters of closed window glass
GB/T 5137.2 Test methods for automotive safety glass - Part 2.Optical performance test
GB/T 5137.3-2020 Test methods for automotive safety glazing - Part 3.Resistance to radiation, high temperature, humidity, fire and simulated climate
test
GB/T 11942 Color measurement method for colored building materials
GB 15763.3 Safety glass for building Part 3.Laminated glass
GB/T 42788-2023 Smart Glass Terminology
JC/T 2631-2021 Electrochromic Glass
3 Terms and Definitions
The terms and definitions defined in GB 15763.3 and GB/T 42788-2023 and the following apply to this document.
3.1
organic-electrochromic film
A film in which the organic color-changing dielectric material undergoes a reversible electrochemical reaction under the action of an external electric field and exhibits a change in spectral transmittance.
[Source. GB/T 42788-2023, 3.4, with modifications]
3.2
A laminated glass product having at least one layer of organic electrochromic film (3.1) in its structure and capable of achieving spectral transmission change.
3.3
bleached state
Under given control conditions, the visible light transmittance of electrochromic glass reaches the highest state.
[Source. JC/T 2631-2021, 3.3]
3.4
tintedstate
Under given control conditions, the visible light transmittance of electrochromic glass reaches the lowest state.
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GB/T 45921-2025: Organic-electrochromic laminated glass used in buildings
Status: Valid
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