U of S | Mailing List Archive | alt-photo-process-l | Re: Fish Eyes again

Re: Fish Eyes again

"PV19 -> strong paint" is a side note, irrelevant to the main subject
fisheyes... I use very little of this when compared to the other colors
I'm currently testing/trying for tricolor (BTW, it occured to me that it's
stronger than Ivory black). So far it gives me nice reds (when combined
with Schmincke Yellow Raw Ochre 656 - a mixture of PY42 and PY43) and
violets (when combined with PB29 Ultramarine Blue). But I can't get a
neutral black with this combination (but brown). What other pigment would
you suggest for being able to get neutral black in tricolor printing?
(Tricolor -> Cyan from Red, Magenta from Green and Yellow from Blue.)


16 Eylül 2008, Salı, 7:12 pm tarihinde, Katharine Thayer yazmış:
>> On Sep 15, 2008, at 11:33 PM, Loris Medici wrote:
>> I have the same problem with the same pigment, Schmincke Ruby Red 351
>> PV19. BTW, it's a very very strong paint... Do you think that adding
>> alcohol to the coating mix can help?
> Sorry, this doesn't make sense to me, Loris.  In the pigment lexicon
> I understand, strength of pigment refers to its mixing power (or
> layering power, in our case);   a  strong pigment needs to be used
> sparingly in order to keep from overwhelming the other colors that it
> is mixed or layered with.  In other words, with a strong pigment,
> you need to use much less pigment to get the same color intensity
> that takes more pigment to achieve with a weaker pigment.  (I'm not
> the first person to notice this; I recently came across a paper where
> Demachy was making the same point.)
> So if the PV 19 is a  strong pigment (in my mind, PV 19 is, yes,
> fairly strong as magentas go, but not as strong as lamp black or
> pthalo)  then it stands to reason that you should be using less of it
> to balance the other colors than you might use of a different pigment
> (PR 209, for example, requires a much larger amount of pigment to
> achieve the same effect) and I would think that it would be a mix
> that had more pigment in it that would require smoothing out with the
> Everclear, not one with less pigment.   Unless the purpose of the
> Everclear is to smooth out a watery mix rather than a more heavily-
> pigmented one.  Or unless you're meaning something entirely different
> by the term.  glad you're back, by the way.
> Katharine