Color shift in print

[meris]

Fine patterns in this blue shirt cause some shift in color. When printed the lighter sections of this arm turn purple.

How can you predict and avoid this?

[Damien Symonds]

It's moire.  Start by reading this.  Let me know when you have done so, and we'll discuss further.

[meris]

Read it. That is the 100% print file cut. Do you consider that visible? I mean, those patterns make me dizzy but it looks like the shirt pattern to me.

 

 

[Damien Symonds]

6 hours ago, meris said:

That is the 100% print file cut.

Oh, right!  Ok, in that case, may I see the 100% crop from the same area from your master PSD file?

[meris]

master cutout

 

[Damien Symonds]

Thanks.  So the print was a fairly small one?

[meris]

8*10. Inkjet 

The area shown was about 2"

[Damien Symonds]

Oh.  Inkjet.  That explains a great deal.  I'd be fascinated to know if the same problem occurred with a photographic print.

If you intend to attempt the inkjet print again, you'll need to try the smart-object-surface-blur method I outlined in the article.

[meris]

It's a 12 ink print from my lab on art paper. Because of the paper I can't choose another method. 

 

How blurry should it look to be blurry enough? Because I don't see the issue on screen it is frustrating 

[Damien Symonds]

What do the lab say about it?

[meris]

Spoke to one guy and we checked the colour profile and resolution. He said that it's just a limitation of the printer but he will ask the tech to see if something we can do.

 

He did not have any answers

 

[Damien Symonds]

Well, I think 1 pixel of Gaussian Blur might be enough.  But gosh, I'm only guessing.