ISO 11699-2:2018 pdf download

ISO 11699-2:2018 pdf download.Non-destructive testing — Industrial radiographic films — Part 2: Control of film processing by means of reference values
1 Scope
This document specifies a procedure for the control of film processing systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references,the latest edition of the referenced document (including any amendments) applies.
ISO 11699-1, Non-destructive testing — Industrial radiographic films — Part 1: Classification of film systems for industrial radiography
ISO 18901, Imaging materials — Processed silver-gelatin-type black-and-white films — Specifications for stability
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http.s://www.i.so.org/ohp
— IFC Hlectropedia: available at http://www.electropedia.org/
3.1 film system
combination of film and film processing which is carried out in accordance with the instructions of film manufacturer and/or the manufacturer of the processing chemicals
[SOURCE: ISO 11699-1:2008, 3.1]
3.2 film system class
film system (3.1) classification according to the limiting values given in ISO 11699-1:2008, Table 1
3.3 film strip
piece of film material on which different steps of constant optical density are exposed
3.4 pre-exposed film strip
film strip (3.3) that is pre-exposed by X-rays so as to present at least ten different optical density steps after processing
3.5 net density
diffuse optical density without base and fog density
4 Manufacturing of pre-exposed film strips for control of the processing system
4.1 Size
The film strips shall have a minimum exposed area of 15 mm x 100 mm. The pre-exposed film strips contain areas of constant optical densities in increasing optical density steps. These steps are used for optical density measurements and a blank area for base plus fog density and life expectancy test.
4.2 Selection of film strip type
The selected type of film used for the film strips shall have a response to processing which is representative for the set of films which are classified according to ISO 11699-1. Films of film system class C3 or C4 are recommended for exposure of film test strips.
4.3 Examples of production of pre-exposed film strips
The exposure arrangement is shown in Figure 1. The film strip design is described in Figure 2 and Table 1. A different design and material may be used if it provides the same optical density steps.