Digital BW, The Print

These sprays will change density levels and density distribution in a 
print (more so on RC papers than cotton).  If you make your own 
profiles (eg. with QTR or IJC) then you could simply linearize after 
spraying the printed step wedges.  If you are doing BO printing, then 
make a custom dot gain curve for soft proofing (see Tyler Boley's 
instructions for doing this in the list files).  I did this recently 
for some BO test prints I've been making on semi-gloss and it works 
very well.  My procedure was to first print a step wedge, spray and 
dry, read the density values of the patches, use Martin's spreadsheet 
(also in list files) to calculate dot % values from the density data, 
and finally create the custom dot gain curve in Photoshop color 
settings, per Tyler's instructions, and save as a soft proof file.  The 
soft proof profiles I've made for EEM and semi-gloss this way are 
pretty much WYSIWG when making actual prints.

Carl

On Wednesday, January 7, 2004, at 09:17  PM, George Hartzell wrote:

>
> I've been playing with a can of PrintGuard spray, on Epson Archival
> Matte and Hahnemulle [sic] William Turner.  I've noticed that it
> *does* darken the blacks a bit, but also that it darkens the dark
> grays a bit, the lighter grays a little bit, and the whites not at
> all.  The end result is the midtones are a bit goofy.
>
> How do folks handle this Are folks using customized
> profiles/icq's/curves/... or are they adjusting the images themselves,
> or?
>
> g.
>
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