Re: Dmax versus process?

Sandy,

thanks, your answer is much better then I expected. I'm surprised that you
can't get a better Dmax from gum unless this is for a single coat of course.

I always thought that density measures where dimension less??

Thanks again and my best regards
Yves

PS Thanks to Loris as well.

----- Original Message -----
From: "Sandy King" <sanking@clemson.edu>
To: <alt-photo-process-l@usask.ca>
Sent: Monday, May 01, 2006 11:32 AM
Subject: Re: Dmax versus process?

> Yves,
>
> I don't know if there is a text on this anywhere, but my own
> measurement of reflective Dmax of these type of prints suggests the
> following. This has been for prints with a full range of tones from
> the highlights to the shadows, and is for one coating and exposure.
>
> By process, the maximum Dmax that I have seen are.
> 1. Silver gelatin print on glossy paper -- log. 2.2 or higher.
> 2. Carbon prints on glossy papers -- log 2.0
> 3. Silver gelatin print on matte paper - log 1.85
> 4. Carbon prints on matte type surfaces - log 1.80
> 5. Albumen -- log 1.8
> 6. Pt./Pd. and kallitype -- log 1.55
> 7. VDB and Argyrotype -- 1.45
> 8. Salt Print -- 1.40
> 9. Gum prints -- 1.20
>
> Again, these numbers are based on readings that I have taken of
> actual prints, and will almost certainly differ to some extent from
> the experience of others. Also, toning plays an important role in
> Dmax of all types of silver prints.
>
> It might be interesting to gather more information on this with wider
> sampling, but for useful results it would have to be done in standard
> conditions and with calibrated equipment.
>
> Sandy
>
>
>
>
>
>
>
> >Hi,
> >
> >say you make several prints using the same paper, maybe a step tablet to
> >keep it as simple as possible, what could one expect in terms print Dmax
> >from various process like Salt prints, Kallitype, Vandyke, Argyrotype,
> >Platinum, Palladium and pigment based process say gum and or carbon?
> >
> >If there is some text somewhere on this, it would be fine. I know some of
> >you teach alt-process printing and I'm sure someone as an idea on this,
it
> >doesn't have to be in absolute terms.
> >
> >Thanks
> >Yves
> >
> >PS. Please don't say try it out yourself...
Received on 05/01/06-10:01:02 AM Z