GB/T 10073-2021
Methods of evaluation for image quality of electrostatic copies (English Version)
- Standard No.
- GB/T 10073-2021
- Language
- Chinese, Available in English version
- Release Date
- 2021
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 10073-2021
- Replace
- GB/T 10073-2008
- Scope
- This document describes methods for image quality evaluation of xerographic copies. This document is applicable to the evaluation of print image quality of black and white electrostatic copiers (including multi-function machines), and also applies to the evaluation of print image quality related to consumable materials (such as photoconductor drums, toner, etc.). The print image quality evaluation of other types of copying equipment can be carried out by reference.
- Introduction
Interpretation of the core content of the standard
As the authoritative standard for the image quality evaluation of electrostatic copy products, GB/T 10073-2021 systematically standardizes the use of professional instruments from reflection densitometers to friction testing machines, and establishes a complete evaluation system covering three dimensions: geometric accuracy, optical properties, and defect detection.
Main technical changes
Dimensions 2008 version 2021 version Description of changes Evaluation items 19 items 18 items Delete 5 items such as edge effect, and add 3 items such as black spot/white spot/ghosting Test instruments 6 categories 8 categories Add requirements for whiteness meter and special test paper Calculation formula 12 15 Optimize 3 formulas including starting line error, and add background grayscale algorithm
Detailed explanation of key test methods
Density measurement case
According to the requirements of Clause 7.6, when using a reflection densitometer to measure the three φ6 solid circles below the Temple of Heaven pattern, you should:
- Preheat the instrument for 15 minutes
- Set absolute density mode
- Put 5 sheets of copy paper from the same batch under the sample
- Take the average of the three-point measurements
Typical fault: When the measured value difference is greater than 0.1D, it is necessary to check the toner distribution uniformity or the photoconductor drum aging.
Implementation suggestions
Laboratory construction plan
- Environmental control: It is recommended to configure a constant temperature and humidity system (23±2℃/50±5%RH)
- Instrument selection: The reflection densitometer should meet 0.01D repeatability
- Process optimization: Establish a standardized process of sample pretreatment→geometric measurement→optical inspection→durability testing
Note: For the evaluation of multi-function machines, the reproduction and copying test link of Article 7.18 needs to be added.
GB/T 10073-2021 Referenced Document
- GB/T 4591 Test chart for electrostatic copying process
GB/T 10073-2021 history
- 2021 GB/T 10073-2021 Methods of evaluation for image quality of electrostatic copies
- 2008 GB/T 10073-2008 Methods of evaluation for image quality of electrostatic copes
- 1996 GB/T 10073-1996 Methods of evaluation for image quality of electrostatic copies