Ruby Lith Filters?

Discussion in 'Darkroom Equipment' started by jbridges, Nov 25, 2013.

  1. jbridges

    jbridges Subscriber

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    Hello All,

    Curious. I rent a darkroom space that has been in use since the 80's. I was cleaning off a shelf and found an envelope marked Ruby Lith Filters. They are round and are about 3 inches in diameter, was wondering what is their purpose. I have guesses but figured someone could fill me in.

    thanks
    jb
     
  2. ann

    ann Subscriber

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    they block light, used in alternative processes, and years ago many enlargers had a red filter that would swing out away from the light source and back when one wanted to block the light but see the image.

    Frankly that use was always a mystery to m e, as it is very hard to see.
     
  3. jbridges

    jbridges Subscriber

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    interesting. poor man's thomas light.
     
  4. ann

    ann Subscriber

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    It just hit me as well that we have several attachments for the Saunders 4500 xl enlargers that can be attached and used in the same manner.