Cyanotype

Discussion in 'Alternative Processes' started by gma, Jun 4, 2004.

  1. gma

    gma Member

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    Is there a method to improve the longevity of cyanotype prints? Cyanotype is basically the archaic blueprint process developed in ammonia, isn't it? Frequently I see images that have been stained in tea, coffee or other liquid. Besides the altered appearance, does the staining improve the permanence of the prints? Demos I have seen use ultraviolet light source in the darkroom to expose the print paper or sunlight can be used.
     
  2. ann

    ann Subscriber

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    cyanotype is one of the oldest and most permanent photo processes. The basic chemicals used are Ferric ammonium cirate and potassium ferricyanide. The cheapest method of exposure is sunlight. then washing in water.

    THe use of tea, and other toning combinations is in an attempt to get away from having every print prussian blue,not an archival process.
     
  3. Robert Kennedy

    Robert Kennedy Member

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    IIRC, Cyanotypes are actually pretty stable. Archivability isn't quite an issue.

    And after developing, a solution of household peroxide and water will help bring out the "fullness" of the image.
     
  4. gma

    gma Member

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    Thanks for the info. It seems that paper selection is important for permenance. Some papers yellow and deteriorate more quickly.
     
  5. Robert Kennedy

    Robert Kennedy Member

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    Paper is VERY important. Good quality art paper is best. Lasts forever. Anything used for Pt/Pd printing should be fine.
     
  6. fparnold

    fparnold Member

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    Actually, cyanotype is sensitive to alkaline conditions, so it wants a good quality, unbuffered, paper.
     
  7. nze

    nze Member

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    Don't forget to keep your cyanotype in unbuffered boxes. and don't used any buffered paperto matt and anything closed to the image.