[Alt-photo] negatives for salted paper

bobkiss caribsurf.com bobkiss at caribsurf.com
Thu Jan 11 19:25:12 UTC 2018


     Using Inkpress film in a 3880 and Burkholder's templates I use +25% ink density to print negs for pt/pd printing and find that I only need a very little contrasting agent to get good highlights and good dmax. As per your recommendation, I use +50% on Pictorico Ultra to produce negs with enough density range to finally make use of the scale index of Uranotype.


----- Original Message -----
From: "alt-photo-process-list at lists.altphotolist.org" <alt-photo-process-list at lists.altphotolist.org>
To: "felix martin" <martin.felix at gmail.com>
Cc: "alt-photo-process-list at lists.altphotolist.org" <alt-photo-process-list at lists.altphotolist.org>
Sent: Thursday, January 11, 2018 1:38:34 PM
Subject: Re: [Alt-photo] negatives for salted paper

0% for both the 3880 and P800 all inks with pt/pd.

I never fiddled with ink density with all ink negs until salted paper. 

Salted paper is a completely different beast with its ultra-long exposure scale. I had to go and buy a 41 step tablet for it, too! If you want the shadows to print deeply enough you have to make the highlights denser or it results in a low contrast print. 

And with cyanotype, one day I left a print out in the sun accidentally for an hour and when I developed the much overexposed cyanotype that was all dark blue except for the highest highlights in the print which were still white, this led me to experiment with -10%, -15% and -20% negs. It works great and saves ink! As always, YRMV but if you’re having a hard time printing in the highlights with cyanotype there you have it. 

Caveat: this is completely paper dependent. I most often use -20% with vinegar development and most papers, but, say, with Clearprint 1020H (a gorgeous cotton paper IMHO) I use a denser neg and then overexpose and it is beautiful. One of my favorite thin papers. With sulfamic acid or hydrochloric acid development then you can use a denser neg like a 0%. Meaning that there many interdependent variables.


Christina Z. Anderson
Contemporary Practices in Alternative Process Photography series <https://www.routledge.com/Contemporary-Practices-in-Alternative-Process-Photography/book-series/CPAPP>

> On Jan 11, 2018, at 9:54 AM, felix martin <martin.felix at gmail.com> wrote:
> Christina, 
> What is your ink setting for platinum?
> -Felix
>> On Jan 11, 2018, at 8:46 AM, syroko--- via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
>> Thanks Christina for the quick answer! Much appreciated.
>> Was lovely meeting you last year... and I am reading your wonderful book with great great pleasure!
>> Kristel 
>>> On 11 Jan 2018, at 16:24, Christina Z. Anderson via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
>>> Kristel,
>>> Use Ultrachrome inks but with salted paper I use an all ink negative with a +30 ink density on a 3880 and Pictorico Ultra OHP. It works great. I do the same with a P800, but I will say the P800 tends to print denser and smoother than the 3880.
>>> I used this technique for a semester long salt class with 15 students so it was definitely tested in easily (I calculated based on assignments) 450 prints in that class.
>>> The difference between salt and cyanotype, for instance, is with cyanotype I use an all ink neg with even as low as a -20% ink density!
>>> Once you get the negative right, salted paper just “sings.”
>>> Chris
>>> Christina Z. Anderson
>>> Contemporary Practices in Alternative Process Photography series <https://www.routledge.com/Contemporary-Practices-in-Alternative-Process-Photography/book-series/CPAPP>
>>>> On Jan 11, 2018, at 9:17 AM, syroko--- via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
>>>> Hi all, 
>>>> I am totally new to alt process, so sorry if it’s a simple question.
>>>> I want to create a digital negative for salt prints on an Epson 4900.
>>>> To do so, would you recommend using Piezo inks versus Epson ultrachrome inks? And if yes, would it better to use the Piezo Pro or K7 inks?
>>>> Thanks!
>>>> — Kristel
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>>> Alt-photo-process-list | altphotolist.org
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