Re: What color do SWOP neutral builds create?
Re: What color do SWOP neutral builds create?
- Subject: Re: What color do SWOP neutral builds create?
- From: Don Hutcheson <email@hidden>
- Date: Thu, 24 Jun 2004 23:29:08 -0400
Randy,
In absolute intent, U.S. Web Coated (SWOP) v2, which is an excellent
incarnation of TR001, produces a neutral gray with 50c, 40m, 37y.
In relative intent (subtracting paper color) (SWOP) v2 produces neutral gray
with 50c, 41m, 41y.
For practical purposes you can safely average the effective gray balance
ratio to be about 50c, 40m, 40y, and future editions of SWOP and GRACoL will
give these as the official aim points.
Bear in mind that printing to a gray balance tolerance of +/- 1/2 percent M
or Y is impractical, so any definition of gray balance has to have some kind
of tolerance.
Don
******************************
Don Hutcheson
Hutcheson Consulting
(Color Management Solutions)
email@hidden
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On 6/24/04 12:02 PM email@hidden of
email@hidden wrote:
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Subject: What color do SWOP neutral builds create?
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From: Randy Norian <email@hidden>
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To: email@hidden
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In an ideal world, what color will I get if I send SWOP neutral
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builds to a "perfect" SWOP output device?
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Photoshop tells me that - when I load SWOP coated as my CMYK space-
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I build a few swatches in photoshop
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25, 16, 16 (cmy) shows a Lab value of 79, -2, -3
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50, 39, 39 shows a Lab value of 60, -2, -2
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75, 63, 63 shows a Lab value of 43, -3, -2
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Is photoshop saying that my (predicted) printed output will be those
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Lab values? Those are quite bluish-greenish for neutrals. I had
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sort of expected something closer to L, 0, 0 for output
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--------------------
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If I use Sheetfed Coated as my CMYK space,
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25, 16, 16 (cmy) shows a Lab value of 74,-2,-2
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50, 39, 39 shows a Lab value of 54, 0, 0
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75, 63, 63 shows a Lab value of 37, 0, 1
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Which is more in line with what I expected,
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I have dialed in a Polaproofer to print those L values, but 0,0 (dead
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neutral) at the quarter tones, with good success, but recently have a
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client complaining that the proofs are 'too red' compared to another
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shop.
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So, would a shop with a proofer dialed in to "SWOP" be used to
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greenish -blue neutrals?
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Randy Norian
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