GB/T 12823.4-2008
Photography.Density Measurement.Part 4:Geometric conditions for reflection density (English Version)
- Standard No.
- GB/T 12823.4-2008
- Language
- Chinese, Available in English version
- Release Date
- 2008
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 12823.4-2008
- Replace
- GB/T 12822-1991
- Scope
- This part of GB/T 12823 specifies the geometric conditions for measuring the reflection density of photographic paper and printing plate materials. This section specifies the lighting conditions for each azimuth angle. This measurement is insensitive to directional reflections from striped surfaces. This section does not cover measurement conditions using polarized light. This section applies to the measurement of reflective properties of processed photographic paper materials, and can also be applied to the measurement of the same properties of other materials. This part has the following three main functions: a) The use of reference materials that can be traced to basic physical phenomena and have data is helpful for the calibration and verification of densitometers or spectrophotometers used for density measurement. b) provide a clear basis for measurements to be accounted for, inter-organizational communication and contractual consistency. c) Provide an arbitration function for resolving seemingly different measurement data between systems.
GB/T 12823.4-2008 Referenced Document
- GB/T 11501-2008 Photography.Density measurement.Part 3:Spectral conditions
- GB/T 12823.1-2008 Photography.Denstiy measurement.Part 1:Terms,symbols and notations
GB/T 12823.4-2008 history
- 2008 GB/T 12823.4-2008 Photography.Density Measurement.Part 4:Geometric conditions for reflection density
- 1991 GB/T 12822-1991 Geometric conditions for photographic reflection density measurement
GB/T 12823.4-2008 Photography.Density Measurement.Part 4:Geometric conditions for reflection density has been changed from GB/T 12822-1991 Geometric conditions for photographic reflection density measurement.
