Question about Ilford Multicontrast Filters

sanking

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Does anyone know the spectral characteristics of Ilford multicontrast filters in terms of what light bandwidths they allow to pass at any given number. I looked for this information on the Ilford site and did not find it.

Sandy King
 

Nick Zentena

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No but I wonder if you could work backwards. One of the magazines published a list of Rosco filters and the grades they were equal to.

Rosco Calcolor 15Y, 30Y, 60Y, 90Y, 15M, 30M, 60M, and 90M

From September/October 2005 issue of Photo Techniques
 

Kirk Keyes

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Yes - I have scanned a set that is about 4 years old with a spectrophotometer. I think I went from 300 or 350 nm up to 700 or 750 nm with readings in Absorbance units.

Which filters are you interested in?

Kirk

PS - I also have scans of PMK and Pyrocat-HD negs.
 
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sanking

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Thanks. I would be interested in the absorbance units for Filters #1, 2, 3, 4 and 5.

Will send you some new PMK and Pyrocat-HD negatives developed to the same CI by Blue reading for absorbance readings.

Sandy
 

Kirk Keyes

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Cool -

I have to bleach out the silver to get the best readings if the density if high, so make sure they are ones you can spare.

I'll try to email you the data this evening.
 
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