This method kept the printed K at the correct density. When exporting using the RGB photo files, CMYK process colors, and the GRAYSCALE files, the grayscale is washed out if the export output is 'convert to destination' It mattered not which PDF-X was selected, or none, or what destination profile (ISO coated V2 300% ECI) was set, or preserve
Now convert your image to RGB, as in Figure 5-29. When you convert your image from its current RGB state to CMYK (Image » Mode » CMYK Color), Photoshop will read the settings you have put in and convert the image without a black channel back into CMYK, and you'll end up with a three color image ( Figure 5-30 ).
After converting the color space from CMYK to RGB using the dialogue Image-->Properties in Krita this program is able to store the image as a RGB PNG file. Update: Nicolas pointed out in a comment below: if your .psd file contains several layers it might be necessary, to go into Image-->Convert Image Color Space before saving.
How to Convert RGB to CMYK images in PhotoShop for Printed Books For printing purposes, all images should be converted to use the "CMYK" color space. Following these instructions will ensure smooth processing and the best possible quality.

This format is used for storing bitmap images in an Adobe Photoshop project file. It is stored in uncompressed form, and it includes color spaces, layers with masks, two-color settings, layer structures and other data that allow bitmap photos to be finely edited.

The artist is working in CMYK in Photoshop, on the theory that it's better to convert CMYK to RGB than vice versa, and we'll need both. We'd like to generate a master PDF file for each page which can be rendered into a suitable image for the web and can be used for a print run. That is, rather than export multiple versions from Photoshop, we'd
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  • how to convert rgb image to cmyk in photoshop