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

FW: Fish Eyes again

Hi there, 

How do I unsubscribe from this list?
All of a sudden I am getting these mails and do not know what it is about. 



-----Original Message-----
From: Katharine Thayer [mailto:kthayer@pacifier.com]
Sent: 16 September 2008 18:13
To: alt-photo-process-l@usask.ca
Subject: Re: Fish Eyes again

> 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.