Luminous Landscape Forum
Raw & Post Processing, Printing => Printing: Printers, Papers and Inks => Topic started by: gfabbri on March 29, 2010, 08:36:38 pm
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I'm just curious if profiles for natural rag papers attempt to compensate for their warmth to produce truly neutral whites & grays, or whether the warm tonality of these papers effectively shifts the white balance of images printed on them. From my very limited experience, I perceive whites printed on natural/warm papers as "whiter" than the paper white, but this could totally be a visual illusion...
Just wondering...
-Gian
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It depends on the profile. The white point should be allowed for , of course. The trick is to to allow correctly for the paper colour in linearising the luminosity. Most profiles , including custom profiles , do not do a very good job of this. If done correctly the white may look whiter than the paper. This will be aided by the adjacency effect; a darker tone around a light tone makes the lighter tone look lighter. A luminosity corrected profile makes it look "correct". Everything we see is an illusion. Beautiful profiles enable compatible illusions.
Cheers,
Brian
www.pharoseditions.com.au
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Beautiful profiles enable compatible illusions.
Very poetic... thanks, Brian, for the reply!
-Gian
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I'm just curious if profiles for natural rag papers attempt to compensate for their warmth to produce truly neutral whites & grays, or whether the warm tonality of these papers effectively shifts the white balance of images printed on them. From my very limited experience, I perceive whites printed on natural/warm papers as "whiter" than the paper white, but this could totally be a visual illusion...
Just wondering...
-Gian
Gian,
As long as there is no white ink in your inkset the only compensation for warm papers possible would be neutralising with complementary hues: cyan, green, ink.
Depending on your profile creator that could be a choice but usually is not done down to the RGB 255,255,255 value. If done it would make a more neutral white but with a lower reflectance than the unprinted white. So what you observe will be a visual illusion.
Use a loupe to see whether there are cyan dots in the white. If there are cyan dots there it may even be a flaw in the profile creation if you are working with a combination of Epson, Adobe, Apple components. As I understand it that shift should be visible without a loupe.
met vriendelijke groeten, Ernst Dinkla
Try: http://groups.yahoo.com/group/Wide_Inkjet_Printers/ (http://groups.yahoo.com/group/Wide_Inkjet_Printers/)