ISO 11798:1999 情報と文書化 — 紙への書き込み、印刷、コピーの永続性と耐久性 — 要件とテスト方法 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

International Standard ISO 11798 was prepared by Technical Committee ISO/TC 46, Information and documentation, Subcommittee SC 10, Physical keeping of documents.

Annexes A and B form an integral part of this International Standard. Annex C is for information only.

Introduction

Writing materials and equipment meeting the requirements given in this International Standard can be used in the preparation of paper documents with stable and durable images, i.e. images likely to undergo little or no change in properties that influence legibility and the possibility of copying or converting the paper documents to other data carriers, e.g. microforms.

It is primarily intended for writing, printing, and copying on writing and printing papers and also on photo-copying papers.

This International Standard specifies requirements and testing methods for evaluation of the stability of images. Some properties of an image, e.g. resistance to wear, depend on the combination of the image and the paper. Permanent papers (ISO 9706) and archival papers (ISO 11108), used in the preparation of documents, may differ widely in properties of importance for the quality and permanence of the image. The testing conditions of this International Standard are chosen so that results, representative of the majority of papers on the market to be used for a particular imaging process, shall be obtained.

In this International Standard, the requirements are given in terms of

• image colour strength and appearance;
• lightfastness;
• water resistance;
• transfer of recorded image;
• resistance to wear;
• resistance to heat;
• effect of recording on the mechanical strength of the paper.

More rigorous limiting values and other requirements than those set out in this International Standard may be required when testing material and machinery intended for documents of the highest possible permanence and durability.

Experience has shown that images written with Indian ink as well as printed images using commercial printing inks have a high degree of permanence. There are, however, many documents where acidic inks have affected the paper to such an extent that the paper has corroded, and images produced from dry or liquid toner are also susceptible to ageing problems.

The experience of modern images is limited to a few decades only. Images prepared with modern material and machinery are often completely different from old images with respect to composition and properties. Therefore, conclusions based on studies of old documents in libraries and archives are of limited use when discussing the permanence of modern documents.

Strictly speaking, the only way to test the permanence of the image is to handle the document and to store it under the relevant conditions for long periods of time, perhaps for several hundred years. In practice, one has to rely upon observations made on documents kept for a few years only, and on evaluation of the effect of factors known to influence the permanence and durability of the image.

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.

3 Definitions

For the purposes of this International Standard, the following definitions apply: