In the Export Adobe PDF dialog, select the option Create Separate PDF Files. You can also select File>Adobe PDF Presets and choose a predefined or custom preset. I do not see any difference when outputting to PDF, using color images in ID and converted on the output versus (batch) processing a conventional Grayscale conversion in Photoshop.īoth methods look superior to workflows going from placed CMYK converted pictures and turned to Grayscale on output to PDF. Choose File>Export and choose either the Adobe PDF Print or Interactive format.
On output to Grayscale PDF, every picture (in RGB, CMYK, and Grayscale) are color managed and get a Cal(ibrated) Gray color space, the very same that InDesign swatches get in the PDF, WHEN the (output) Gray color profile is included.Ĭonversion to Grayscale when outputting to Grayscale PDF seems to match the conversion to Grayscale done in Acrobat Pro as Steve Werner has thoroughly tested.
In InDesign CS6, pictures placed in RGB, CMYK and now also in Grayscale color mode are color managed in the Soft Proof. I also found out that Acrobat using Preflight or Convert Colors does the same thing.Īd: Buy Adobe InDesign CS6 at a Low Price from eCostSoftware Choose Adobe PDF (Interactive) from the Format menu in the Export dialog box. UPDATE: After doing some more research, I found out that if you place Photoshop images which have a grayscale profile (e.g., Gray Gamma 2.2, Dot Gain 20%, etc.), gray values are preserved when placed into InDesign and when exported to grayscale. In InDesign CS5, that process is made easier.
However, this is how Acrobat converts to grayscale as well, and I haven’t really heard many complaints. You can create a set of grayscale tints to test this. How much and in what direction depends on the profile you choose. In the Customize Proof Condition, from the Device to Simulate menu, select the same grayscale profile.Ĭaveat: If you have tints or photographs which are already in grayscale, their color values will change somewhat. Why did I suggest choosing Dot Gain 15%? That’s because that is the same setting which Acrobat uses by default when converting your RGB, CMYK or spot colors into grayscale using the method that Keith Gilbert described in his blog.Īdditional Tip: You can preview your document in grayscale in InDesign. Never fear! All of the information is only on the Process Black plate, which you can observe if you move your cursor around the PDF. If you select another PDF preset like High Quality Print or Press Quality, there is no information in the PDF to indicate the output intent so it will appear that there are CMYK separations.