RGB & CMYK problems

KH
Posted By
Kevin_Hiles
Jun 16, 2004
Views
374
Replies
7
Status
Closed
If I manipulate a JPG in Photoshop 7.0 and leave it in RGB mode, then resave it, when I bring it in to Quark 4.0 in a picture box it doesn’t show up (appears white).

I then go into photoshop and change the colour mode to CMYK and resave it, that seems to fix the problem, I’m sure why that is? What if I want to leave it in RGB?

I think this has also happend when the image started in CMYK mode, I then had to change it to RGB to fix the problem.

Can anyone give me a reason for this. It think it might have something to do with it being a PICT file or something?

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RB
Robbie_Boyer
Jun 16, 2004
Quark tends to have issues with certain files at times. Make sure you have all the add-ons downloaded from quark for supporting specific files.

I know 4.0 supported jpg, but there were also a few updates since then because there were problems with files in quark.
HK
Harron_K._Appleman
Jun 16, 2004
Kevin,

What if I want to leave it in RGB?

Why would you want to do this?

Quark — especially circa version 4.x — is a page layout program that expects to output to Postscript devices. Your placed objects should be CMYK.

If I manipulate a JPG in Photoshop 7.0 and leave it in RGB mode, then resave it…

What format are you saving to (TIF, EPS…)?

=-= Harron =-=
KH
Kevin_Hiles
Jun 17, 2004
Robbie,

Thanks for the advice…maybe there’s a plug in I can download?

Harron,

I usually do save in CMYK, I’m not sure why this happens, sometimes I have to switch from RGB to CMYK and sometimes from CMYK to RGB (to fix the problem). I think it might have something to do with my source for the file (i.e. scanning, download, stockphoto).

It doesn’t happen every time either, only sometimes. I think I have to pay attention to where the file came from to find a fix.

I’ve only started having this problem since I’ve had PS 7.

If you have anymore ideas please let me know.

Thanks for your help,

Kevin
HK
Harron_K._Appleman
Jun 17, 2004
Kevin,

You didn’t answer my second question: After you manipulate your image, what format do you save to?

=-= Harron =-=
KH
Kevin_Hiles
Jun 17, 2004
Harron,

I save as a JPG and that’s when I have the problems, if I save as a TIFF, which I usually only do do if I’m going to press, or if I’m printing at Hi Res, the problem doesn’t happen.

Sometimes I produce documents to be printed on one of our network copiers…my computer is old and not that powerful (PII 233, 144 MB ram)and therefore smaller compressed files keep my computer from crashing.

Kevin
HK
Harron_K._Appleman
Jun 17, 2004
Kevin,

OK. Now we’re getting the complete picture.

1. Smaller image files might be advantageous in parts of your workflow for your stated reasons but realize that they must be decompressed to full pixel dimensions at print-time. You might be creating more, not less, processing overhead for your aging PC.

2. Although there are such things as CMYK JPEGs, this is not a universally recognized format. Some image editing/viewer applications won’t even open them. I don’t know how Quark, in particular, reacts to CMYK JPEGs, but this could well be the source of your difficulties.

3. Resaving a JPEG to JPEG is a bad idea. Even at the highest quality settings, you’re compounding compression artifacts. Do it if you must — e.g., for Web work — but avoid it if you’re going to print locally or go to press.

My advice would be to stay with TIFFs.

=-= Harron =-=
KH
Kevin_Hiles
Jun 18, 2004
Harron,

Thanks for the help! I guess I’ll try sticking to TIFFs for most of my work. I guess that should alleviate most of my problems.

Kevin

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