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.) Thanks, Loris. 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 >
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