BW Paper, BW Print optimized Color Negatives either Analog or Digital

Mustafa Umut Sarac

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• Jan 5, 2014

• #1

Mustafa Umut Sarac submitted a new resource:

(there was a url link here which no longer exists) - BW Paper, BW Print optimized Color Negatives either Analog or Digital

AFAIK only colored bw film negatives are stained Pyro ones. And only BW paper optimized print systems are Zone System and Beyond the Zone System. But there is no trace of paper optimized color digital or analog negative for BW prints.

And I dont know if there is a panchromatic paper available. May be all papers are orthochromatic and they act to shades of blue and green printed digital,analog negatives more effectively. I am starting to research of color shades of Pyro Negatives and...

Click to expand...

(there was a url link here which no longer exists)

 

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VPooler

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• Jan 5, 2014

• #2

Quick google search revealed that there ARE panchromatic papers - Kodak used to make one, Ilford still makes three of them.
http://www.ilfordphoto.com/products/producttype.asp?n=4&t=Photographic+Papers+Digital
(there was a url link here which no longer exists)
Honestly, I fail to see the whole point of this. Spectral sensitivity curves of various papers are widely available.

 

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Mustafa Umut Sarac

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http://www.ultrafineonline.com/ilrcdibwpafo2.html

Can anyone wish to help me to find spectral curve of that paper ?
Thank you vpooler.

Umut

 

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• Jan 5, 2014

• #4

Mustafa Umut Sarac said:

http://www.ultrafineonline.com/ilrcdibwpafo2.html

Can anyone wish to help me to find spectral curve of that paper ?
Thank you vpooler.

Umut

Click to expand...

It may be found on Ilford's website.

 

VPooler

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http://www.ilfordphoto.com/Webfiles/20064181450482628.pdf literally the first result in google

 

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Mustafa Umut Sarac

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Ilford Gallerie Panchromatic Digital Paper Fact Sheet

Here is the attached spectral curve .

 

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• Ilford Gallerie RC Digital bw paper panchro.pdf

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Mustafa Umut Sarac

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Ilfospeed Panchromatic Digital Paper Paper

Ilfospeed Digital Paper Curves

 

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Mustafa Umut Sarac

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Ilfospeed Panchromatic Digital Paper

Ilfospeed Digital Paper Curves

 

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Mustafa Umut Sarac

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• #9

Black and White prints can be made directly from colour
digital files although the results are often unsatisfactory
unless the file is first converted to greyscale. We would
therefore recommend colour files be converted to
Greyscale, prior to printing. The smaller files made by
discarding the colour information are also much quicker to
RIP and write. There is another advantage to doing this,
as some colour originals printed straight to Black & White
do not make suitable or interesting images without some
adjustment to their contrast or density.

Above statement comes from attached ilford paper. If we would print bw negatives on panchro bw papers , what is the point of making panchro bw paper ? Am I missing something ?

Umut

 

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eddie

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• Jan 5, 2014

• #10

They are not referring to negatives. They are talking about files.

 

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Mustafa Umut Sarac

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What is the difference between color file and color negative and how differ to print analog or some lcd screen ? - If digital files printed by lcd optical screen on this paper ? If they printed by laser or rgb light sources , I dont know.

 

eddie

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• #12

I don't know, as I don't do any digital. You should probably ask at DPUG.

 

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• Jan 5, 2014

• #13

If you think about why we might use colour contrast filters in B+W photography you will understand why colour negative to B+W may not come out as expected.

 

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Mustafa Umut Sarac

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• Jan 5, 2014

• #14

Bill , Thank you, good point ! I will ask that at forums.

 

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• #15

The papers mentioned here are designed for tri-color laser system.

 

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Mustafa Umut Sarac

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Thank you Vpooler. Yes , Prof.Pixel warned as they made to printed under RGB laser systems not white light. Its better to leave these panchro papers at their place and switch to ortho papers.

Now the question , how we can improve the bw print with colored , stain colored, negative ? Can we paint the negative , I bet silk dyes works or can we digital manipulate the masks and color zones referencing the spectrum.
I will find a widely available paper and continue.

 

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• #17

Well, if the negative is stained and affects contrast, you could probably just put a filter with exactly the opposite effect to use. Determine the shift and correct accordingly. And I see why not to do local contrast masks. People do that, I am sure.