Did I mess up big time? (Ilford MC filtering)
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From: <jjs> on 13 Jan 2008 21:49 I'm on the edge of beating myself up. I got a very clean Ilford 400 enlarging head. It mounted properly to my enlarger. Tomorrow I will get some more paper with the intent of using it. But the filters are Yellow and Magenta. Are these not the filters used for Ilford MC? I ask because a friend suggested they are not. Let me have it. I deserve it. jj
From: Rob Morley on 13 Jan 2008 22:48 In article <13oljep59cmg16b(a)news.supernews.com>, <jjs> says... > I'm on the edge of beating myself up. I got a very clean Ilford 400 > enlarging head. It mounted properly to my enlarger. Tomorrow I will get some > more paper with the intent of using it. > > But the filters are Yellow and Magenta. > > Are these not the filters used for Ilford MC? They're the right colours, but they might not give a full or evenly- spaced range of grades, or consistent exposure. Try it and see.
From: Ken Hart on 13 Jan 2008 23:45 <jjs> wrote in message news:13oljep59cmg16b(a)news.supernews.com... > I'm on the edge of beating myself up. I got a very clean Ilford 400 > enlarging head. It mounted properly to my enlarger. Tomorrow I will get > some more paper with the intent of using it. > > But the filters are Yellow and Magenta. > > Are these not the filters used for Ilford MC? I ask because a friend > suggested they are not. > > Let me have it. I deserve it. > > jj > > _Generally_, if you have to use cyan, you screwed up (I've never done reversal color, where I suspect cyan would be used). Remember, if you add all three colors, you get neutral density (less light across the spectrum). I have a set of color printing filters for my Omega D2V. The set as purchased included perhaps a dozen each of yellow and magenta in different densities, but only four or five cyan densities. The old Polycontrast filters each required a different exposure. If you had a perfect density print with a grade 2 filter, and wanted to change to grade four, you had to come up with a new exposure, using your Kodak Darkroom Dataguide. The newer filters have neutral density added (cyan) so that the exposure changes only once (when you switch from 3 to 4, IIRC. I could go downstairs to check, but...)
From: Lawrence Akutagawa on 14 Jan 2008 00:43 <jjs> wrote in message news:13oljep59cmg16b(a)news.supernews.com... > I'm on the edge of beating myself up. I got a very clean Ilford 400 > enlarging head. It mounted properly to my enlarger. Tomorrow I will get > some more paper with the intent of using it. > > But the filters are Yellow and Magenta. > > Are these not the filters used for Ilford MC? I ask because a friend > suggested they are not. > > Let me have it. I deserve it. Spare yourself. A bit of research on the net dug up the following: http://www.ilfordphoto.com/Webfiles/20062111029251325.pdf in which is - "The simplest way of controlling the colour of the light reaching the emulsion during exposure is by the use of filters: a magenta filter absorbs green light and transmits blue; a yellow filter absorbs blue light and transmits green."
From: Rob Morley on 14 Jan 2008 07:49
In article <fmep98$2gl$1(a)aioe.org>, Ken Hart kwhart1(a)verizon.net says... > The old Polycontrast filters each required a different exposure. If you had > a perfect density print with a grade 2 filter, and wanted to change to grade > four, you had to come up with a new exposure, using your Kodak Darkroom > Dataguide. The newer filters have neutral density added (cyan) so that the > exposure changes only once (when you switch from 3 to 4, IIRC. I could go > downstairs to check, but...) > With this head the control unit should compensate for exposure when you change the grade. |