GB/T 12823.4-2026Photography and graphic technology - Density measurements - Part 4: Geometric conditions for reflection density (English PDF)
摄影和图形技术 密度测量 第4部分：反射密度的几何条件
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Issued by
State Administration for Market Regulation
Level / Type
National · Recommended
Issue date
July 2, 2026
Implementation date
February 1, 2027
Scope
GB/T 12823.4-2026 is the English-translated version of 摄影和图形技术 密度测量 第4部分：反射密度的几何条件.
GB/T 12823.4-2026 — Photography and graphic technology - Density measurements - Part 4: Geometric conditions for reflection density
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Document preview — GB/T 12823.4-2026
National Standard of the People's Republic of China
- ICS
- 37.040.01
- Classification
- G 80
- Replacing
- GB/T 12823.4-2008
Issued by: State Administration for Market Regulation
Contents
- Document data1
Document data
International classification (ICS): 37.040.01.
Chinese classification (CCS): G80.
Estimated length of the Chinese original: 20,236 words.
Supersedes the earlier edition GB/T 12823.4-2008.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 14 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 12823.1-2026Photography and graphic technology - Density measurements - Part 1: Geometry and functional notation
- GB/T 12823.3-2025Photography and graphic technology - Density measurements - Part 3: Spectral conditions
- GB/T 19437-2025Graphic technology - Spectral measurement and colorimetric computation for graphic arts images
- GB/T 2900.65-2023Electrotechnical terminology - Lighting
ISO 5 · ISO 13655 · IEC 60050
Cited by
- GB/T 12823.1-2026Photography and graphic technology - Density measurements - Part 1: Geometry and functional notation
- GB/T 12823.3-2025Photography and graphic technology - Density measurements - Part 3: Spectral conditions
- GB/T 18117-2025Photography - Processed photographic colour films and paper prints - Methods for measuring image stability
- GB/T 19437-2025Graphic technology - Spectral measurement and colorimetric computation for graphic arts images
- GB/T 19894-2025Digital still-picture cameras - Methods for measuring opto-electronic conversion functions(OECFs)
- GB/T 33153-2025Imaging materials - Reflection colour photographic prints - Test print construction and measurement
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Related Standards
GB/T 12823.1-2026 — Photography and graphic technology - Density measurements - Part 1: Geometry and functional notation
GB/T 12823.3-2025 — Photography and graphic technology - Density measurements - Part 3: Spectral conditions
GB/T 19437-2025 — Graphic technology - Spectral measurement and colorimetric computation for graphic arts images
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GB/T 12823.4-2026
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