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Acrobat vs Photoshop Color Profiling
Post subject: Acrobat vs Photoshop Color Profiling
Posted: 11-07-2012, 01:40 PM
Sprocket Joined: 09-20-2012, 04:08 PM Posts: 3
I'm having a bit of a problem printing with Acrobat Pro. Everything comes out much darker and muddled than it should, and much darker than printing with Photoshop. I have both programs set up the same way with regards to working color space. Both are set to manage colors, and both are using the same profile.
Funny thing is, that both of them show accurate results when I use the "Proof" modes. They show how it will look like when it prints. What I don't get is why they would print differently when using the same ICC profile.
Screenshot (links to bigger version) :
You can see that the color is much worse in Acrobat on the left. And when I print with Acrobat that's what I get. Photoshop is much nicer.
It's really only a minor hassle to print from Photoshop instead of Acrobat, but I am still curious as to why this may be happening, and if there is any way to fix it. It would be nicer to print from Acrobat when doing sets that have a lot of pages, instead of loading each page into a separate Photoshop tab.
Post subject: Re: Acrobat vs Photoshop Color Profiling
Posted: 11-18-2012, 09:58 AM
Sprocket Joined: 09-20-2012, 04:08 PM Posts: 3
So I've found out more information about this. First, it is only an issue with PDFs that have no color profile embedded. It was just dumb luck that I found the issue, because the Oubliette seems to be the only set I own without an embedded profile.
Below is an image that helps explain what is going on a bit.
On the left is a hallway from Himmelveil Streets. It has an embedded profile of "sRGB IEC61966-2.1". On the right is a hallway from a Streets Kitbash which has no embedded profile (Acrobat reports this as "Device RGB"). To find out if a PDF has an embedded profile, you can run any PDF analysis Preflight in Acrobat Pro. Then look at Overview>Color Spaces. If there is an ICC color space it will be listed there.
So in the picture, both have the same output preview applied. In this case the output target is a custom profile for my printer I created with Profile Prism, which gives me much nicer prints than the stock Epson profile. If I print both of these from Acrobat using that printer profile, the colors will not match between the two tiles. That is because Acrobat makes a guess of the color space of the one without the embedded profile, and guesses wrong. If I print in Photoshop, the colors will match. That's because Photoshop is better at guessing.
One last note: Acrobat only uses Relative Colormetric as a rendering intent. This means that it favors relationships between colors more than color accuracy. Photoshop gives you different choices; one which I like for this is Absolute Colormetric which preserves any color that the device can use and clips the ones it can't. Relative is great for photos, but I personally think Absolute looks better for WWG products, which tend to use distinct colors for elements. For example, when I print the Thoumonts bookshelves in Relative, I get more detail in the shadows but the whole think looks a little faded. In Absolute, the books are vibrantly colored, but I lose shadow detail because some of the dark colors are out of my printer's gamut. It's a personal choice, but if you like the results of Absolute better, you must print using Photoshop. If you ever intend to switch printers or ink brands, Absolute may provide better matching between the devices.
In summary, if the PDF has an embedded ICC color space, you are good to go. If it does not, you may be better off printing from photoshop. If any kitbashers read this, please use the "sRGB IEC61966-2.1" color space (because that's what WWG uses) and make sure it gets embedded. kitbash.psd is in this color space, so if you start with it, you should be good.
If people want, I can start listing sets and kitbashes which I own that are missing embedded profiles.
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