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Thread: Use of X-ray film: technical discussion with example images

  1. #6011
    Tin Can's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    THE problem is the new improved 2 Watt red LED

    When we first bought them they were 1 watt

    Nothing written in the box or LED

    I just found a NIB 1 Watt as I bought the originals by the box

    double trouble

  2. #6012

    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by j.e.simmons View Post
    I have the Kodak GBX-2 filter which is advertised for use with X-ray film.
    Jason told me either 1A or XRAY filter with RED LED No probs at all. Put it together and test it!

    Without the red Kodak filter the LED was fogging his EI 25 Dry Plates during coating.

    He sent me speed plates, then told me to throw them in the trash. He replaced them with plates coated with double safe safelight
    Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/

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  3. #6013
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    Re: Use of X-ray film: technical discussion with example images

    What type and wattage are you using with the Kodak filter?

    At what distance, is it bounced or direct?

    It is good the filter is still sold, I had a handful of damaged old ones, pinholes and worse

    Kodak GBX-2 Dark Red Safelight Filter 5.5" for Blue-Sensitive X-ray Film & Green-Sensitive Medical X-ray Film

    I just ordered one, I have several KODAK Bullet fixtures with 1 Watt Red LED, bounced off ceiling

    I think an incandescent white 15 watt bulb was specified

    Oven Bulbs!

  4. #6014

    Re: Use of X-ray film: technical discussion with example images

    I measured the direct light distance to make sure it was not under six feet. About 7 feet or so direct.

    I suspect strongly I was told to get; what Jason linked me at the time was the older one watt variety.

    The light is bright enough over the dev tray to lift the film up and clearly examine the shadows; straight replenished Microdol-X about 18 minutes typical

    Low and Slow dev



    Kodak 1A Grey Bullet Safelight 2 by Nokton48, on Flickr
    Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/

    “The secret of getting ahead is getting started.”
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  5. #6015

    Re: Use of X-ray film: technical discussion with example images

    Randy,

    Here I what I using, no fog even at 25 minutes

    YGA03A44-3W Red-1
    120V 55ma 3W E26

    I bought used 1A's and bullets on Ebay Maybe $40 each
    Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/

    “The secret of getting ahead is getting started.”
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  6. #6016

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    Re: Use of X-ray film: technical discussion with example images

    I have the 15-watt bulb that came with the kodak fixture. It’s still good. Kodak says a 25-watt bulb can be used indirectly.

    My tests this morning were with the leds bounced off the ceiling.

  7. #6017
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    Re: Use of X-ray film: technical discussion with example images

    2013 Darkroom, sold the space and reduced DR size in new location

    DSCN3573 by TIN CAN COLLEGE, on Flickr


    DSCN3570 by TIN CAN COLLEGE, on Flickr

  8. #6018

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    Re: Use of X-ray film: technical discussion with example images

    Found this, noticed a recommendation for 2.5 minute exposure limit at 4' 15 watt bulb

    KODAK Safelight Filter #GBX-2, 5 1/2' Round Size, for Blue Sensitive X-Ray Films & Green Sensitive Medical X-Ray Films.
    Universal safelighting for both intraoral and extraoral dental filmsThe GBX-2 (ruby red) safelight filter is a universal safelight filter that can be used in dental darkrooms where both intraoral and extraoral films are processed. A frosted bulb of 15 watts or less should be used in the safelight, which should be at least 4 feet (1.2 m) from the film.The GBX-2 safelight filter may be used in darkrooms where manual processing is performed, provided that film handling under safelight conditions is limited to approximately 2 1/2 minutes.

  9. #6019
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    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by Bob Wagner View Post
    Found this, noticed a recommendation for 2.5 minute exposure limit at 4' 15 watt bulb

    KODAK Safelight Filter #GBX-2, 5 1/2' Round Size, for Blue Sensitive X-Ray Films & Green Sensitive Medical X-Ray Films.
    Universal safelighting for both intraoral and extraoral dental filmsThe GBX-2 (ruby red) safelight filter is a universal safelight filter that can be used in dental darkrooms where both intraoral and extraoral films are processed. A frosted bulb of 15 watts or less should be used in the safelight, which should be at least 4 feet (1.2 m) from the film.The GBX-2 safelight filter may be used in darkrooms where manual processing is performed, provided that film handling under safelight conditions is limited to approximately 2 1/2 minutes.
    Excellent Bob!

    Thank you

    Overnight I found and bought 3 more VGC KODAK Bullet lamp fixtures

    I will wait and see what filter they have

  10. #6020

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    Re: Use of X-ray film: technical discussion with example images

    I'm still using the 7w incandescent red bulbs. Though my body is between the bulb and the film, I'm also fighting light leaks in my community darkroom. So, I generally use the SP10 covered for the first 3-4 minutes of development of single sided mammo film. I should try using it as a tray only and check for issues.

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