CMS setting in Rip

[Hanson]

Is there anyone can suggest below situation:

1/Should I put the press ICC profile into the Refine processplane as the "final output colorspace" after I get the Press ICC profile for my own printhouse if I don't know the colorspace for my original input file.

2/ what is proper setting in refine for digital proofing if don't know the colorspace of original file.

3/how can we evaluate the inkjet proofing if press man complain that they can't get the printout which match with proofing in visual?


any suggest will be appreciated!

 

[rich apollo]

1/Should I put the press ICC profile into the Refine processplane as the "final output colorspace" after I get the Press ICC profile for my own printhouse if I don't know the colorspace for my original input file.

2/ what is proper setting in refine for digital proofing if don't know the colorspace of original file.

3/how can we evaluate the inkjet proofing if press man complain that they can't get the printout which match with proofing in visual?

It is preferable to have files tagged with ICC profiles to avoid the situation you're in. In the absence of any ICC profiles attached to the incoming files, you MUST make an assumption (a guess) about the colorspace of the file.

If someone asks you, "How do I get to your house?" your first response is naturally, "Where are you coming from?". I like to think of ICC profiles as describing a trip. Where are we? Where are we going? How are we going to get there?

Consider that when the file goes on press, it IS in the Press' colorspace. That makes it justifiable to assume the colorspace described by the "Press ICC profile" is the colorspace that the file is in.

So, at the end of the refining process the file is in the Press' colorspace. Going to a proofer changes the destination. We are taking a file from the Press' colorspace and going to the Proofer's colorspace. There's your flow - Press --> Proofer. If you proof that way, then you should have a proof that the pressmen can match, assuming the proofer is set up correctly.

 

[Greg_Firestone]

Rich - well stated. Nice analogies.

 

[Ozkan Hangisi]

Is there anyone can suggest below situation:

1/Should I put the press ICC profile into the Refine processplane as the "final output colorspace" after I get the Press ICC profile for my own printhouse if I don't know the colorspace for my original input file.

2/ what is proper setting in refine for digital proofing if don't know the colorspace of original file.

3/how can we evaluate the inkjet proofing if press man complain that they can't get the printout which match with proofing in visual?


any suggest will be appreciated!

Hello,

1/ Images without source profile are headache. Not very safe but I usually try to guess using TIL tool. Mostly 300%=SWOP, 330=ISO Coated_V2 or Fogra39 (Worst case to guess), 350%=Fogra27, For RGB images it is mostly sRGB. If job is critical i prefer to contact with customer to learn exact source profile. And sometimes I print files just as they are. I always adjust press acording to 12647-2 and use process profiles (like ISO Coated_V2 or ISO Uncoated etc.) for color seperation and proof simulation. If your print setup is not suitable for ISO standarts then you should create and use custom press profile.

2/ Actually there is nothing with source profile for digital proofing. It shows how all these CMYK numbers will look on target color space. If you don't like color results on proof you can play guess game for source profile to convert or you can change colors manually in application programs till you reach to desired results. Then you send your job to press. Just be sure you send same CMYK numbers to proof device and press. (After you get proof, No extra in RIP color management accidently during plate expose)

3/ You need a verifiying tool for your proof. First order Fogra Media Wedge or something similar and print it with all your proofs. Get tools for measuring and evaluating and add your measurement report to your proofs as label. If label shows "This proof is simulating print conditions (For example ISO_Coated_V2 or any custom profile) correctly" then your pressman must adjust his press acording to referans profile conditions or whole system needs a new custom press profile.

Special case : Even proof report is valid and press is in right conditions you can still have visual missmatch. In this case you should be in trouble with OBA. You can find detailed information in Gordo's blog.

Hope it helps