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Thread: developer claim

  1. #1
    rmolson's Avatar
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    developer claim

    I came across a photgraphic site in the UK about a developer Spursinn HCD that is suppose to boost TRix to 25,000!!!!! Canít seem to find out anything else about it. Anybody familiar with such a wild claim Once heard of a claim of boosting Super XX to Weston 10,000 in the early 50ís but they used mercury fumes to hypersensitize the film and then reverse the film among other techniques

  2. #2
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    i'd love the ability to shoot at that speed.
    www.EASmithV.com

    "The camera is an instrument that teaches people how to see without a camera."ó Dorothea Lange
    http://www.flickr.com/easmithv/
    RIP Kodachrome

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    Nonsense. It's probably just a low contrast/compensating developer that allows you to greatly extend development time without highlights going all the way to D-max. Any way you cut it, exposing Tri-X at an EI higher than 400 is underexposure, and exposing it at 25,000 is simply extreme underexposure.

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    It's funny even in 2013 people are still trying to sett snake oil.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  5. #5

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    ...and even in 2013 people still want Tri-X to do anything they dream up.

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    Which site in the U.K. and who is making the claim. A user or the maker of the developer? Thanks

    pentaxuser

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    Quote Originally Posted by pentaxuser View Post
    Which site in the U.K. and who is making the claim. A user or the maker of the developer? Thanks

    pentaxuser
    The site is ag photographic, and they are making the claim, for both Tri x and hp5+, and claim that it comes from the maker,
    Richard

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    AG Photographic are selling it in the UK.

    I got some to try and the fact sheet that comes with it is to say the least 'comprehensive'. It can be used in either one or two parts, and lists a bewildering range of times for various films and rendering (fine grain, prominent grain etc.). I would agree that it could well be a compensating developer repackaged, but it does make great claims for increasing film speed, not something I associate with tradtional compensating developers. Sorry but I haven't tried using it yet.

    Steve

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    Quote Originally Posted by Michael R 1974 View Post
    ...and even in 2013 people still want Tri-X to do anything they dream up.
    So far it's done pretty dang well for some values of "anything".



    s-a
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  10. #10
    AgX
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    Actually the claim by the manufaturer for highest speed has been raised to "ISO 51200" for Tri-X and Tmax 400.

    For other ISO 400 films it lies between ISO 400 and ISO 25600

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