ANSI PH2.50 : 1983
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
DIRECT-EXPOSURE MEDICAL AND DENTAL RADIOGRAPHIC FILM-PROCESS COMBINATIONS - ISO SPEED AND AVERAGE GRADIENT
03-15-2022
01-12-2013
1. Scope and Field of Application
2. References
3. Definitions
3.1 Exposure, X
3.2 ISO Speed
3.3 ISO Average Gradient
4. General Conditions
4.1 Film Orientation
4.2 Safelights
5. Standard Exposing Conditions
5.1 Temperature and Moisture Content of Film during
Exposure
5.2 Radiant Energy Quality
5.3 Exposure Uniformity
5.4 Exposure Scale
6. Processing
6.1 Delay before Processing
6.2 Process Specifications
7. Densitometry
8. Evaluation
8.1 Base Plus Fog Density
8.2 Measurement of ISO Speed
8.3 Measurement of ISO Average Gradient
Figure - Method for Determining ISO Speed and Average
Gradient
ANNEXES
Annexe A Calibration of Ionization Chambers
Table A1 Calibration Parameters
Annex B Manual Processing with Standard Chemicals
Table B1 Developer Composition
Table B2 Fixing Bath Composition
Annex C Process Specifications
Annex D Cross Index for Standards Approved by the
American National Standards Institute (ANSI)
and the International Organization for
Standardization (ISO)
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