From: Sandy King (sanking@clemson.edu)
Date: 07/04/03-05:53:29 AM Z
Many digital negatives made from pigmented inks, even those that
appear completely neutral in tone, function as spectral negatives in
that their actual UV reading, and effective printing density range
with UV sensitive processes, is much greater than one would surmise
either by visual inspection of the negative or by densitometer
measurement with a Visual or Blue channel reading. For example, a
recent steptablet test negative I printed on the Epson 2000P, on
Pictorico OHP, showed the following readings.
Visual Blue UV
Step 1 2.27 2.30 3.35
Step 21 0.03 0.05 0.18
Visually this negative is very neutral black in tone, and does not
appear to have a lot of contrast. But, as one could say about most
negatives, it is not what they look like that like that counts, but
how they print.
Sandy King
>Loris,
>
>don't give up on the desktop negatives yet.... depending on the ink,
>you may get an actual reading of density with a UV densitometer much
>higher than with a visual reading on a standard densitometer. Sandy
>King has demonstrated this.
>
>Mark Nelson
>In a message dated 7/3/03 3:59:32 AM, lorism@tnn.net writes:
>
>>I have Dan Burkholder's book on this subject and also print digitally
>>using pigmented "Piezotone" brand quadtone inks. I don't have the
>>possibility of imagesetter output (this is a very expensive option in
>>Istanbul) and will try digital negatives with the Piezotones. But I'm
>>not much hopeful; I don't have access to Pictorico OHP film (the best
>>transparency option for pigmented inks - do you know any other?) and I
>>seriously doubt that it can reach enough density (the best Dmax. I had
>>from these inks was 1.53) on glossy transparency media. AFAIK, these are
>>very delicate too - pigment ink smears very quickly on
>>glossy/transparency. I would like to hear comments, suggestions on this
>>issue...
This archive was generated by hypermail 2.1.5 : 08/07/03-03:34:49 PM Z CST