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Canon has a series of products under the “Glossy Photo Paper” name, with the formula identification number of GP 401. They used to make many different types of paper under this formula, but now it seems they only make the credit card sized paper.

The paper is flawed in that it has a slightly reddish tinge, which makes pictures a tad warmer than they should be. Compared against Canon’s PR 101 Photo Paper Pro (which is an almost neutral white, very slightly on the warm side), GP 401 can be described as pink.

This pink color shifts flesh tones and anything that uses magenta ink to print out to be shifted over to the pink side as well. Unfortunately, the only way to get Canon branded credit card sized paper is to use this paper.

So, I just spent the last two hours slowly tweaking an existing ICC profile for a similar paper (Canon’s Photo Paper Plus, which isn’t nearly as red) to work correctly with this paper.

To get you close to the correct colors, set your “Media Type” to “Glossy Photo Paper”, and use the manual color adjustment dialog (click “Color Adjustment: Manual”, and click on “Set…”) to increase cyan to 35, magenta to 10, yellow to 25, and decrease intensity to -10. These alone increase the quality of output on GP 401 a lot, and make it similar to Photo Paper Pro.

Also, if you’re using Photoshop, or any similar professional printing application, disable ICM and use “Print Type” set to “None”. In Photoshop, you typically use Photoshop’s built in color management.

To use said color management, use “Print With Preview”, and select “Color Handling: Let Photoshop Determine Colors”, “Printer Profile: Canon i9900 SP1″, “Rendering Intent: Preceptual”, and turn “Black Point Compensation” on.

Now, this isn’t as good as just having an ICC profile for the GP 401, but it is about the best you’re going to get, it seems.