Re: Lamination
Re: Lamination
- Subject: Re: Lamination
- From: "Ernst Dinkla" <email@hidden>
- Date: Tue, 20 May 2003 09:48:18 +0200
----- Original Message -----
From: "Johannes Hoffstadt"
<email@hidden>
To: <email@hidden>
Sent: Tuesday, May 20, 2003 8:51 AM
Subject: Re: Lamination
>
Dan,
>
>
you wrote that you want to put the two profiles for
>
unlaminated and laminated print together. So do you
>
perhaps look for a conversion that negates the effect
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of the laminate, to be applied to unlaminated CMYK?
>
>
I have some experience with laminated and varnished
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offset prints (e.g. on cardboard, used as book covers
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or in packaging). There the coating is typically an
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OPP material with 0,01 to 0,15 mm thickness and almost
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no color on its own. The optical effects (dot gain,
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color shifts) can be described by simple corrections
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to unlaminated measurement data or profiles (but are
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dependent on raster frequency).
>
>
Since your lamination gives a yellow cast, you are
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probably using much thicker coating material. Still
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I'd be willing to compare your two measurements and
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see if it fits into my experiences.
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>
Best regards,
>
>
Hanno Hoffstadt
Hanno,
There have been reports that the Epson Ultrachrome inks shift to
yellow when a hot lamination is done. It isn't clear in the
original message whether the inks are Epson Ultrachromes. If it
is controllable with profiles at all (heat control on the
lamination calandre will have an influence) then it can only be
done with a custom profile for the laminated product. That makes
it difficult to judge quality at the printer.
Ernst
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