Q: CMYK-JPEG positive/negative problem

CW
Posted By
Christian Westphalen
May 25, 2005
Views
540
Replies
4
Status
Closed
Hi,

Photoshop supports the out-of standard CMYK-JPEG format and depending on the version of PS it´s often rendered in third-party-applications as a negative. I recommend to use EPS JPG-coded, but what i really would like to know:
How can i decide, if i have to render the JPEG positive or negative? Is it a decision based on the creator or is there another tag that i could use for the decision?

Thanks in advance,

Christian Westphalen


www.christian-westphalen.de

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T
Tacit
May 25, 2005
In article <d71nmo$km2$>,
Christian Westphalen wrote:

Photoshop supports the out-of standard CMYK-JPEG format and depending on the version of PS it
CW
Christian Westphalen
May 25, 2005
Tacit wrote:
In article <d71nmo$km2$>,
Christian Westphalen wrote:

Photoshop supports the out-of standard CMYK-JPEG format and depending on the version of PS it´s often rendered in third-party-applications as a negative. I recommend to use EPS JPG-coded,…

Why? If you’re using EPS files, odds are good your intentions are to take them to press. Why bother with lossy compression that degrades image quality? Anyone who’s doing professional print production in this day and age should be able to handle uncompressed files; hard drives and RAM are cheap, cheap, cheap.

It´s a question of bandwith, there are still some places where DSL is not available and it´s "good enough" f.e. for newspaper print.

Christian


www.christian-westphalen.de
O
Odysseus
May 25, 2005
In article ,
Tacit wrote:

In article <d71nmo$km2$>,
Christian Westphalen wrote:

Photoshop supports the out-of standard CMYK-JPEG format and depending on the version of PS it´s often rendered in third-party-applications as a negative. I recommend to use EPS JPG-coded,…

Why? If you’re using EPS files, odds are good your intentions are to take them to press. Why bother with lossy compression that degrades image quality? Anyone who’s doing professional print production in this day and age should be able to handle uncompressed files; hard drives and RAM are cheap, cheap, cheap.

Moreover JPEG-encoded EPSFs may not separate properly from certain applications (e.g. QuarkXPress) or on certain RIPs. Uncompressed files are much more portable IME.


Odysseus
T
Tacit
May 25, 2005
In article <d721k9$rbs$>,
Christian Westphalen wrote:

It

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