Loris,
I am going to put my neck on the chopping block and venture to say that yes,
you would get a higher DMax with a more heavily pigmented mix (up to point of
failure/washing off), but that would not necessarily mean a lower contrast
negative would be required, since the exposure scale would have more to do with
the dilution of the dichromate than the amount of pigment—exposure scale and
DMax are different beasts.
With regards to duotone prints, I think that you would find that converting
an image to duotone might be a good way to get a sense of what the two color
combinations would look like, but I don't think that a duotone image as a
negative would be possible to work with—I think it would take a negative and a
positive—just as full color gum takes 3 separation negatives.
Best Wishes,
Mark Nelson
Precision Digital Negatives
PDNPrint Forum @ Yahoo Groups
www.MarkINelsonPhoto.com
In a message dated 12/13/05 7:41:56 AM, loris_medici@mynet.com writes:
> My understanding is: "Because you can't get acceptable dmax without
> using a very high contrast (heavily pigmented) emulsion, and when you
> print with such an emulsion you have to use a very low contrast negative
> - which will cause loss of local contrast and delicate tonal gradations
> + increase the risk of flaking, giving you a grainy print".
>
> BTW, here's my question: I plan to print duo-pigment gums, a bluish dark
> gray (Schmincke Neutral Gray #785, PR251 + PB60 + PG7) for shadowns and
> a reddish brown (Schmincke Madder Brown #670, PR206) for highlights. I
> will print using digital negatives. Is there any way I can use
> Photoshop's Duotone image mode in order to design/predict the results
> and design curves/negatives giving that particular look in my monitor?
>
Received on Tue Dec 13 20:37:18 2005
This archive was generated by hypermail 2.1.8 : 01/05/06-01:45:10 PM Z CST