5x7 green xray film

[Jay DeFehr]

Remember, halogen light is very red, and your film is blind to red. Your EI will likely be much higher in daylight. Have fun!

[willrea]

Film came in today. Package says that it is made in Belgium and finished in USA. Not sure who coats films in Belgium.

Agfa had a plant in Belgium. I think it's still running under a different company. I'm still confused how and who took control of what after Agfa went under.

[Dcohio]

Remember, halogen light is very red, and your film is blind to red. Your EI will likely be much higher in daylight. Have fun!

Jay,
Thank you for this tip. I understand there is a more full spectrum of light outside and how full will depend conditions( shade, full sun, reflected light,etc). Do you have a rough ballpark EI's you use for different lighting conditions? I know these may not apply to my shooting but I am curious. Mother nature can be tough and you wouldn't be able to nail down an exact EI for every situation but a rough 1 would help in a lot of situations.
Thanks,
Doug

[Andrew O'Neill]

Dcohio, as Jay stated, halogen light is more in the red spectrum so it might be a good idea to do an EI test. Also, watch out for reciprocity effects. I ran a test a couple of years ago, and this film is greatly affected by exposures 1 second and longer. Some people claim that they don't bother with exposure/dev compensation, but my tests show otherwise. I think I posted my findings somewhere in this forum. I'll attach it here so you don't have to look for it...
I just ordered some (agfa) green latitude in 14x17. Did cxs put their prices up? If I recall, it was around $80 in your money about a year ago...Now it's $102. Hmmmm, have they caught on that we photographers like this stuff or something?

[Jim Noel]

Jay, It is very slow. I don't have any speed index for the material I am using but, when I am enlarging 35mm negs to 8x10, I am getting exposure times of several minutes (5 to 8) with the enlarger lens wide open. I have been developing it in D-72 1:3. This gives me negs that I can use for carbon printing.

Dan

The reason for the "slow" response is the light source. Green sensitive xray film responds at an EI of 100-125. The light source in your enlarger contains a lot of red in its spectrum - the film is not responsive to red.

[LabRat]

The reason for the "slow" response is the light source. Green sensitive xray film responds at an EI of 100-125. The light source in your enlarger contains a lot of red in its spectrum - the film is not responsive to red.

This is where an LED head would come in very handy, as even white LED's have much more green/blue and some UV in the output...

Much of the halogen bulbs output is in IR...

Steve K

[pjd]

Interesting thread, I was starting to wonder about the source of this 5x7 x ray film - when I noticed the thread is from 2011.