scottk

My purpose is only academic. I want to visualize in my brain how enlarger contrast filters effect/compare with, paper sensitivity curves. The public darkroom I rent will not be open for at least another 3 months so unfortunately I'm back to thinking about other things then analog photography. Thanks for all the interest/replies.

Got side tracked by all sorts of things : ) Life happened.

Great news, at least for me. Ilford just sent me a pdf showing the MG filter spectral sensitivities, just what I was looking for (they had been on virus lockdown). Attached here. Thanks for all the comments.

Thanks for the reply. This is mostly over my head, but I'll read it again as I learn more.

That would be fantastic! Looking forward to the results. Thanks!!

These diagrams are GREAT! I actually print with a Saunders Color head. When I dial in 30M does it correspond to the curve here?

SORRY! My mistake. I ment kodak Filter Handbook was <$10. Alan kindly gave me the link to the Contrast Control tech sheet.

Thanks Bill, this is great information. I'll have to wait until the campus library opens for the CRC handbook, but, in the meantime, Iford Contrast Control is <$10 on ebay. Thanks.

Thanks Alan, I've looked at a few of the Iford paper tech sheets but don't see what you are referring to. Could you post an example link for me to look at? There are a lot of things on those tech sheets I don't understand (yet). If there are equivalent CC filters I could probably find their spectral info online as B/W filter info is available. My purpose is personal education/understanding to see how things work. I'd like to plot the transmission spectrum of each filter against the emission spectrum of the enlarger light source. Adding to that, the spectral sensitivity of papers.

Hello- I am looking for the transmission spectra for the Ilford Multigrade Contrast filters. I've been through the web, no result. Even contacted Ilford but no reply after 2 months. Thanks.