Digital BW, The Print

Hi James,

I did experiment with Liquitex a bit early on but since I discovered
the line of Golden Paints acrylic that flows more evenly on the print
with less shrinkage I quit using it. PrintShield I have never used so
I really can't say anything about it. Now if it's designed to block
out UV then chances are it may have some yellowing characteristic.

One thing that I found that yellows your print is the UVLS additive
that might be in your coating solutions. I don't know if the Liquitex
varnish or PrintShield you use has it but if it does that might exlain
it. Perhaps the yellowing is more pronounced in color prints than in
black and white.

Sofar the sprays I use haven't caused any yellowing but I must watch
for the new spray that I like alot: Golden Mineral Spirit Acrylic with
UVLS. Golden spec sheet for this material claims that it resists
yellowing but I haven't used long enough to tell. Now why doesn't
Golden make this varnish without UVLS?

This coating really gives you incredible dmax and overall much broader
color gamut. It might be a good idea to let your test charts age a
couple months before profiling. I will do a test myself to see how a
test strip change over time with the coating.

--nick

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, James Haney
<jhaney@l...> wrote:
> I don't know if Nick is still active on this list but here goes.
> 
> I have similar reasoning and methods for inkjet coating and have 
> incorporated some of the techniques he mentioned on this list last 
> august. One of those was spraying a coat of Print Shield on the print 
> before coating with Liquitex acrylic varnish.
> 
> However, I am beginning to think that the combination of Print Shield 
> and this varnish causes yellowing. At this point I am far from 
> convinced that this is true, but I think I have eliminated other 
> variables and the only similiarity I can seem to find in some images I 
> have printed that have yellowed after only a few months is this 
> combination.
> 
> I have a couple of prints that seem to have warmed up since 
> October/November stored in a stack of archival prints in my office.  A 
> client called me the other day to say that their print (yet to be 
> framed) had "turned yellow" I haven't seen it yet, but should get it 
> next week.
> 
> Any experience or informed speculation would be appreciated.
> 
> FYI
> 
> Hanemuhele Photo Rag 308
> Epson 7600
> MIS UT7 inks
> QTR - Mac
> Premier art print shield
> Liquitex Acrylic Medium and Varnish - Gloss
> mixed with Distilled water and a small amount of Liquitex Acrylic 
> Medium - Matte