Digital BW, The Print

John, If I am reading your post correctly, you are saying that as the dyes
mix together, that act, is causing them to fade. Any idea what they are
doing? And are there tests that were done to predict this fade in
relationship to amounts of  X amount of A + X amount of B fades at a rate of
Y? 

 

You can email off list if you wish, but I just find that real intriguing. 

 

Eric Neilsen Photo

4101 Commerce Street, Suite 9

Dallas, TX 75226

214 827-8301

 

http://ericneilsenphotography.com

SKype ejprinter

 

  _____  

From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of sinar001
Sent: Thursday, November 13, 2008 2:00 PM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] Re: 100 Hour Direct Sun Torture Test -Aardenburg

 

South window tests are good indicators on how an "unknown" paper/ink
combination will work, when compared to a "known combo". Putting
samples in the window without this kind of comparison will not yield
very valuable information. (even with a control sample stored in a
like situation but in the dark) 

A low humidity situation with dye inks, will tend to skew results in
making you think they are more fade resistant. I don't believe
humidity is nearly as important factor with pigmented inks as with dyes. 

Dye inkjet inks "co-mingle". The prefered papers are swellable
polymer, which tend to isolate the droplets, from one another. The
co-mingling of dyes, causes premature failure of the weaker dye.
Humidity plays a roll, the higher RH, will cause the dyes to migrate
even within the swellable polymer ink receptor, again causing
pre-mature failure. 

This complex situation regarding humidity levels is why the major
players have all gone to using pigmented inks for "archival" results.

John Nollendorfs 
--- In DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogroups.com,
"mccormick.mark59" <mark@...> wrote:
>
> --- In DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogroups.com, Ernst Dinkla
<edinkla@> wrote:
> > If I do 
> > not trust a paper that hasn't been tested somewhere else I 
> > hang half a print in a glass window facing east. That place 
> > is hardly heated and humidity is usually above 50%.
> 
> Artists' window tests where prints are taped to a window have a lot
of infrared (IR) energy 
> exposure that doesn't occur at locations further into the interior
of the building. I have 
> measured print surface temperatures as high as 54 degrees centigrade
(130 deg. F) under 
> those conditions so desiccation is still very strong even though the
print is indoors.
> 
> Best regards,
> 
> Mark
> http://www.aardenbu <http://www.aardenburg-imaging.com> rg-imaging.com
>

 



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