Document authenticity

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Document authenticity is a property of writing media such as ink for the production of documents and certificates and of utensils for their storage.

Document-proof ink must meet various criteria. It must dry quickly (smudge resistance), it must not be correctable (erasable) and it must not be possible to remove it without leaving traces. The color must remain legible after a defined dose of sunlight and must not fade beyond a defined level ( lightfastness ). Under the influence of water , the ink may only extend so far that the text lines remain visible (water resistance), and it must be resistant to certain chemicals and solvents. The test criteria required for this are specified in the ISO 12757-2 standard. Only writing media that meet this standard may use the predicate for document authenticity. The standard prescribes the following designation for this: Name (e.g. "ballpoint pen"), number of the standard (ISO 12757-2), classification abbreviation for refill and nib, marking "DOC".

Utensils for storing documents are document-proof if they do not damage or alienate the document.

Commercially available transparent sleeves made of soft PVC can detach polymeric toners from laser printers from the paper due to the evaporation of solvents or plasticizers; toner and ink rub off on the film. They are therefore not considered document-proof. Since 2014, however, a soft PVC film has also been available that has been classified as virtually document-proof for all printing processes commonly used today and is suitable for permanent archiving. This film has a high degree of flexibility and breaking strength and can be equipped to withstand cold fractures down to −20 ° C.

PVC films without plasticizers (rigid PVC) are indeed document-proof, but these films break very quickly under heavy use, especially at low temperatures.

Document-proof writing media

Non-document-proof writing media

Note on fountain pens

Inks intended for fountain pens do not always meet the requirement of document authenticity. Iron gall ink is classified as indelible, but tends to precipitate and build up which can impair the proper function of the writing instrument or make it unusable. Therefore, iron gall inks are only suitable for immersion nibs. Inks with nanoparticles as dyes generally do not have the disadvantages mentioned and are suitable for fountain pens (observe manufacturer's instructions) in order to produce authentic writing.

supporting documents

  1. HP ink excellent - Officejet Pro 8100 and 8600 print document-proof
  2. Document authenticity for HP OfficeJet printers ( Memento of April 6, 2012 in the Internet Archive )