Digital BW, The Print

Stephen,

Your information is very interesting. Thanks for taking the time to 
share it.

I am going to check out the section of Dan's book that deals with making 
two negs. Hey, If this does not work there is always traditional 
enlarged negatives.

Mike


On Wednesday, May 1, 2002, at 05:20 PM, Stephen Kundell, MD wrote:

> Mike,
> The digital neg is what got me here in the first place. I have not 
> tried using my epson to produce a dig neg, but did produce image setter 
> negatives that I contact printed on both silver and palladium-platinum 
> as ziatypes. Some of the images were stunning, the best of both worlds. 
> Unfortunately, I abandoned the effort because I found it extremely 
> difficult to find service bureaus willing and able to do what I needed. 
> Another occassional problem was related to the necessity of using a 
> transfer function which tended to compress some areas of the gray 
> scale. Realistically, you are probably dropping the number of distinct 
> shades of gray to well less than 100. This works for some images, but 
> in others you will see a little posterizing. This is why Dan Burkholder 
> would often use two negatives for exposure, one to separate the 
> shadows, and one to separate the highlights. Printing your own desktop 
> negs will similarly affect the gray scale. In essence, you are going 
> from a fairly linear gray scale to a more logarithmic one, consistent 
> with the response of photographic vs printing materials.  I will be 
> interested to hear how it goes.
> You might consider dye based inks on pictoro translucent media. You 
> might also be able to acheive some of the effect of the transfer 
> function by varying the color along your gray scale, with red obvious 
> being most dense as viewed by the sensitized photo materials, blue 
> being more transparent. If I had enough time in this 
> life...............................
> Stephen
>
>
> [Non-text portions of this message have been removed]
>
>
>
> Please visit the Group Homepage to check the Files, Bookmarks, Polls 
> and other resources as they are often being updated. The page is at:
>
> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint
>
> Please follow these basic guidelines:
> - Include your full name with your message.
> - Include the address of your website, if you have one.
> - As threads develop, trim off excess portions of earlier messages to 
> keep them short.
> - As the topic of a thread changes remember to change the subject 
> header.
> - Good manners are required at all time. No personal attacks or 
> "flames."
> - Complete your Yahoo profile.
> - Before posting a question, search the message archives and the 
> various resources on the homepage.
>
>
>
>
> Your use of Yahoo! Groups is subject to 
> http://docs.yahoo.com/info/terms/
>
>