Applying effects in InDesign File

Question

When I apply an effect to my InDesign file, the grayscale photography in the fie automatically gets screened back to 50%. Why is this happening? It does not do this with a cmyk image.

Answer 1

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ID does not support Grayscale profiles and puts the image on the Black plate of the CMYK working space using wahtever numbers are saved in the file. this can result in a image that is either lighter or darker than you expect looking at the image in Photoshop. The addition of transparency forces ID to display the preview accurately according to the separations, so some shift could become apparent. For the absolute most accurate grayscale conversion, create a color settings file in Photoshop that uses the Black Ink channel of the destination CMYK working space in in ID. To do that, make sure the "more Options" has been selected in the edit color settings dialog in Photoshop, then choose Load Gray from the Grayscale dropdown, and finally choose the CMYK profile you want to use.