Aktuelle Messwerte 02.09.2010

pH-Wert: 8,53
alkalische Reserve: 1,8% CaCo3/kg
Verfestigung: 30%
Microfilming

3 reprocameras for microfilming plus our own developing equipment constantly in use.

GSK system


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Quality assurance >>

Inexpensive and efficient securing on microfilm

The estimated life expectancy of microfilm is about 500 years. Filming valuable documents is a very inexpensive and efficient method for preserving contents in the long term, making them available to many users and reducing storage space requirements. Once the original has been filmed and subsequently preserved, it can then be blocked from further use, which also increases its lifespan. In addition, an unlimited number of film copies can be made without having to access the original again.

GSK offers two kinds of film for microfilming. So-called "thick film” is 30.5 metres long and accommodates 600 to 1,000 exposures, depending on the format of the original. With a length of 66 metres, normal film is more than twice as long and has space for 2,250 document images in A4 format. Thick film is more durable than normal film, but is also somewhat more expensive to process, as cameras have to be specially adjusted for it and in total more film is needed for the same number of images. Normal film has the advantage that it can store more images and requires correspondingly less storage space. There is no difference between the two films in terms of image quality.

Strict quality checks

Both the filming of the holdings and the development of the microfilms takes place at the Archive Centre Berlin, and is carried out by qualified personnel according to DIN ISO 6199. After development in-house a reader is used to check the quality of the images in terms of brightness, legibility and focus as well as completeness. In order to make additional possibilities for using the preserved material available, we offer digitisation of the microfilms after the quality checks have been completed.

 

Workflow of the microfilming

  • Determining treatment criteria
    A questionnaire is used to establish the criteria for treating the archival materials and all steps that need to be carried out are determined in accordance with the customer’s wishes.
  • Microfilming
  • Quality check

 

Microfilming equipment

 

Microfilming

Zeutschel OL 2 – quality check

 

3 cameras for microfilming: Zeutschel OK 401

Microfilm developing apparatus

Reader for checking quality: Zeutschel OL 2