CYMK vs. RGB

[David Rowland]

hm.. ok if Corel Draw mode change to CMYK was dropping the colour too much (however clarity should be effected but u can see your pic and I cant)

I sometimes take a photo out of Corel (Edit bitmap) and then pass it across to Photoshop and that is my bitmap program that I am familar with.

In Photoshop my colour settings are set to European and then I convert from their, you may find the colour change more pleasing.

What you got to remember is CMYK is limited amount of colours to a RGB image.

[Harry Cleary]

Are you sending by PDF Angelique? I usually convert any photos to CYMK in the PDF settings…never noticed a problem before.

[Peter Normington]

what you see on screen, is not what the print will be, it depends on the process your printer will be using, and what your colour management is set to. to be certain of the results you will need a proof from your printers, before commiting to the final production,

Peter

[Alan Drury]

RGB is light and cmyk is ink and it is impossible reproduce in cmyl every colour thast can be displayed in RGB and that is probably the clarity/colour shift you are seeing ie rich blues and some other colours lose their vibrancy. The conversion by Corel and other programmes will depend on colour management somewhere along the line, the idea being what’s displayed more accurately reflects what gets printed. In corel I use Adobe RGB 1998 as the central colour space and Euroscale coated V2 for the separations printer and that works ok when I send stuff of for either digital or litho print output.
Do expect that colour shift with some colours though
Alan D

[Angelique Muller]

Thanks for all your comments. The change is not huge, but a while back I send an image of for printing business cards. When it came back I was hugely disappointed with it. I would not like to repeat that. I would just hope that what I see on my screen will be close to the actual print.. But without proofs it will always be a risk?!?

[Alan Drury]

It is well worth getting your colour management sorted out, that way you can design and send stuff with some degree of confidence. Understanding the colour models, colour management and what you printers’ need is essential for reliable and consistent colour.
Alan D

[Angelique Muller]

quote Harry Cleary:

Are you sending by PDF Angelique? I usually convert any photos to CYMK in the PDF settings…never noticed a problem before.

I just tried that and it seems to be better!! That is good… only thing is that I don’t really understand why…… What is the difference? The converting is within the same program?!?
I think I need to read some books to explain to me what is actually happening. I would love to understand these things properly.
Are there any books out there that one can recommend?

[David Rowland]

Well the real basics in CMYK and RGB is these vids

Additive colour vs subtractive colour
http://www.youtube.com/watch?v=ygUchcpRNyk

What are Cmyk and RGB colour modes?
http://www.youtube.com/watch?v=0K8fqf2XBaY

Here is a talk about Colour Profiles
http://www.youtube.com/watch?v=JY2QqZ4Tycc

[Peter Normington]

nice links dave
thanks

peter

[Angelique Muller]

Thanks for those links Dave!
(All i need now is a decent internet connection so I can actually watch you-tube clips in one go..…)

[David Rowland]

Angel, your a sweetheart x
Just press play and then pause.. let the bar fill up… then unpause 🙂

[Angelique Muller]

quote Dave Rowland:

Angel, your a sweetheart x
Just press play and then pause.. let the bar fill up… then unpause 🙂

Don’t worry Dave, every now and then I have to vent my frustration about the broadband ‘service’ that we have. Not that it is of any use: I would change provider……….if there was an alternative.

[Harry Cleary]

quote Angelique Muller:

quote Harry Cleary:

Are you sending by PDF Angelique? I usually convert any photos to CYMK in the PDF settings…never noticed a problem before.

I just tried that and it seems to be better!! That is good… only thing is that I don’t really understand why…… What is the difference? The converting is within the same program?!?
I think I need to read some books to explain to me what is actually happening. I would love to understand these things properly.
Are there any books out there that one can recommend?

Have no idea why it happens Angelique, but it is much better. I use the same printers in Tralee all the time and I now know what to expect from certain settings in the pdf…..I’d nearly be afraid to read Dave’s links :)..if you told a centipede it had a 100 legs it would probably trip all over itself.:D