Kalt Mini Red Safelight

Discussion in 'The Darkroom' started by pip_dog, Mar 13, 2018.

  1. pip_dog

    pip_dog TPF Supporters Supporting Member

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    I needed a new safelight as my old Delta Junior bulb got smashed in the process of moving house, so I drove 1.5 hrs to the closest camera shop to me and picked up the "Kalt Mini Red Safelight", product #NP11178. It fogged my paper almost instantly, completely unusable :apologetic:. Just to be sure I stood in my darkroom for ten or fifteen minutes to make sure there were no light leaks anywhere, none. I did the coin test under the safe light, failed miserably. I am using Ilford Multigrade IV, same paper I used under my old safelight. Figured that a red safelight was a red safelight, am I missing something important?

    Thanks


     
  2. compur

    compur Been spending a lot of time on here!

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    Actually most multi-contrast papers require an amber safelight known as a Kodak OC or equivalent. Ilford calls theirs a #902 filter.

    See Ilford MGIV data sheet for their equivalent safelights and filters:

    https://www.ilfordphoto.com/amfile/file/download/file_id/1960/product_id/745/

    Usually red bulbs are used for orthochromatic materials like ortho films though some have both red and amber filtration and I would guess that was what your old red bulb had.

    But, just to make things more confusing some B&W papers can use regular red bulbs. So, always check your paper's datasheet for safelight recommendations first.
     
    Last edited: Mar 13, 2018
  3. pip_dog

    pip_dog TPF Supporters Supporting Member

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    Thank you for for the info, compur. I was working off what the internet was saying about red being safer than amber because it emits light at a spectrum farther away from what my paper was sensitive to. Serves me right for not reading the manual! I'll look into buying one of the safelights Ilford lists.

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