Rollei Rapidry

Discussion in 'B&W: Film, Paper, Chemistry' started by dnjl, Oct 20, 2011.

  1. dnjl

    dnjl Member

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    Maco in Germany is selling this peculiar chemistry called Rapidry. It claims to dry freshly developed film in 5min so that it is ready for enlarging or scanning, and supposedly makes the film antistatic. Drying film is a major pain for me, since I don't have any dust-free space and the shower is being used constantly. This Rapidry thing looks great to me, but I have some doubts. Maco says the following:

    Has anyone used this stuff? What is it exactly? Does it work as advertised, and more importantly, does it have any detrimental effects on the film? What about archival stability?

    Any insight would be much appreciated.
     
  2. cmo

    cmo Member

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    There was a similar stuff named Drysonal from Tetenal. It was horribly expensive and it's not available any more.

    Ingredients:
    - Distilled water
    - Alcohol
    - Some antistatic wetting agent

    5 min. is extremely optimistic :smile:
     
  3. AgX

    AgX Member

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    The basic idea is to have a fliud that mixes with water and has a high degree of evaporation. Inserting the washed, wet film into such fluid will cause a diffusion process in which the content of water in the film will be reduced and substituted by time with that fluid. Drying this film now will be faster due to hat high rate of evaporation.
     
  4. Vaughn

    Vaughn Subscriber

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    Newspaper photo labs used this trick with plain alcohol
     
  5. brucemuir

    brucemuir Member

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    Or they printed em wet :smile:
     
  6. mwdake

    mwdake Member

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    I put a capful of isopropyl alcohol in my final rinse.
     
  7. Necator

    Necator Member

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    I have tried it, with less than good results. It dries the film fast, but when I used it, it left stains on the film. Plus, it has a horrible, formaldehyde like smell. I would think that isopropyl alcohol as suggested above would work as well or better. And probably cheaper as well.
     
  8. railwayman3

    railwayman3 Member

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    I can just remember the my Dad trying out the Drysonal, around the 1970's or early 80's....there seemed no real advantage over air-drying for routine use.

    IIRC, it couldn't be used with color films.
     
  9. kodel

    kodel Member

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    Bit of an old thread, but Google doesn't care.

    I used Rapidry today for the first time. Bad experience.
    After 5 min, my film was dry but crackled, as if it was dried in the oven. The surface was all bulged and it curled towards the emulsion side. I resisted the urge to rinse it again and waited a bit more. Half an hour later the film had straightened out and looked perfectly normal.
    When I wanted to scan the negatives, I noticed these seemed to be a kind of greasy film on the non-emulsion side of the film. On top of that I found water spots (dry, but visible deposit) on both sides of the film.

    The film seemed to scan perfectly and the water spots or grease have no visible impact. However, all of my negatives have streaks of very small black and white spots. They are not dust. The streaks might correspond to the area where I brushed the film (with an antistatic brush to remove dust). They might be the result from the grease I found on the film. Maybe this is a substance of Rapidry that has 'eaten' into the emulsion?

    This negative is a good example (open the original 25Mpx version to see the black/white dots): http://www.flickr.com/photos/kodel/7269639842