ISO 11798 pdf download.Information and documentation — Permanence and durability of writing, printing and copying on paper — Requirements and test methods
1 Scope
This International Standard specifies requirements and test methods for evaluation of the permanence and durability of writing, printing and copying on paper stored in libraries, archives and other protected environments for long periods of time. It is applicable to – images on paper with the exception of documents within the scope of ISO/TC 42, Photography ; – multicoloured images. The information contents of multicoloured images should be retained but not necessarily the full artistic quality of the coloured image. Documents where the information contents are influenced by small colour changes are not covered by this International Standard. It does not apply to – documents stored under harmful conditions, such as high humidity that may promote microbiological attack, excessive heat, radiation (e.g. light), high levels of pollutants, or the influence of water. Since documents may be kept in non-protected environments before being transferred to protected environments, resistance to water and light is, however, of importance; – legal documentation, e.g. banking documents, where the authenticity is of primary interest.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 5-3:1 995, Photography — Density measurements — Part 3: Spectral conditions. ISO 1 924-2:1 994, Paper and board — Determination of tensile properties — Part 2: Constant rate of elongation method. ISO 2470:— 1 ) , Paper, board and pulps — Measurement of diffuse blue reflectance factor (ISO brightness).
3 Definitions
For the purposes of this International Standard, the following definitions apply: 3.1 copying production of an image on paper which is a reproduction of the image of another document carrier, e.g. by a photographic or xerographic process 3.2 document recorded information which can be treated as a unit in a documentation process [ISO 51 27-1 :1 983 6) ] 3.3 durability the ability to resist the effects of wear and tear in performance situations 3.4 image pigments distributed on paper as characters or other visually identifiable patterns 3.5 monochromatic image image with recording in one colour 3.6 multicoloured image image composed of recording in more than one colour, where the colours constitute part of the information contents 3.7 permanence the ability to remain chemically and physically stable over long periods of time 3.8 permanent image image which, during long-term storage in libraries, archives and other protected environments will undergo little or no change in properties that affects its use. NOTE Examples of such properties are the stability of the created image (e.g. legibility and contrast) and the stability of the system of recording on paper. 3.9 printing production of an image on paper from a printing device, such as a printing press, a thermal printer or a computer printer (e.g. a laser printer or ink jet printer) 3.10 recording writing, printing and copying 3.11 spot-coloured image image with different colours in separate parts, so that the colours are not superimposed 3.12 writing production of an image on paper, one character or stroke at a time EXAMPLES By hand with a pen or pencil or by means of a typewriter or pen plotter.
4 Required characteristics
Paper documents conforming to this International Standard shall meet the following requirements. Specimens for testing shall be prepared as described in clause 5. 4.1 Optical density The optical reflection density of monochromatic images, determined as described in 6.1 , shall meet the requirements in Table 1 . These requirements are applicable also to spot-coloured images. No minimum values are set for multicoloured images. 4.2 Appearance Each element of the image shall be clearly defined and easily legible when inspected as described in 6.2. The colour strength shall be even. Images prepared by stamp-pad inks shall be legible. No feathering or strike-through is acceptable. 4.3 Lightfastness After illumination in accordance with 6.3, the optical density of monochromatic images shall meet the requirements of Table 1 . These requirements are applicable also to spot-coloured images. The colour tone may change but it shall still be recognizable as being of the same colour as before treatment. Multicoloured images shall meet the requirements of Table 2. Measurements shall be performed in accordance with ISO 7724.