Dominique Perchet Posted March 24 Share Posted March 24 Unable to convert RGB files to CMYK process despite multiple attempts. Each time, the file comes back in RGB. This is a new problem So far, everything was fine. What? Quote Link to comment Share on other sites More sharing options...
walt.farrell Posted March 24 Share Posted March 24 What exactly have you tried to do? Which application are you using (and what release of the application)? Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. iPad: iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1 Link to comment Share on other sites More sharing options...
Dominique Perchet Posted March 24 Author Share Posted March 24 2 steps 1 - configuration : cmjn then, 1 close the file then I open and I retrieve my file in RVB (second picture) Quote Link to comment Share on other sites More sharing options...
lacerto Posted March 24 Share Posted March 24 You cannot technically save an opened .PNG image as a CMYK file (even if Affinity app will seemingly allow saving a CMYK .PNG file "back" with existing file name). When you close and reopen the file, it will still be in RGB color mode (but at least the colors are not messed up, as they used to be at some point). [So, after conversion, export the image to a file format that supports CMYK, like JPG or TIFF.] henryanthony and Alfred 2 Quote Link to comment Share on other sites More sharing options...
Alfred Posted March 24 Share Posted March 24 Just now, lacerto said: You cannot technically save an opened .PNG image as a CMYK file (even if Affinity app will seemingly allow saving a CMYK .PNG file "back" with existing file name). When you close and reopen the file, it will still be in RGB color mode (but at least the colors are not messed up, as they used to be at some point). It really would be better if the app refused to allow an operation which is incompatible with the chosen file format. I haven’t checked whether a warning is triggered by an attempt to save a JPEG as CMYK when the existing file is RGB (or vice versa) but if not it should be! GripsholmLion 1 Quote Alfred Affinity Designer/Photo/Publisher 2 for Windows • Windows 10 Home/Pro Affinity Designer/Photo/Publisher 2 for iPad • iPadOS 17.4.1 (iPad 7th gen) Link to comment Share on other sites More sharing options...
Alfred Posted March 24 Share Posted March 24 57 minutes ago, Dominique Perchet said: 2 steps 1 - configuration : cmjn then, 1 close the file then I open and I retrieve my file in RVB (second picture) If you need to save to a lossless format (which I presume is why you aren’t using JPEG) then you could use TIFF instead. Quote Alfred Affinity Designer/Photo/Publisher 2 for Windows • Windows 10 Home/Pro Affinity Designer/Photo/Publisher 2 for iPad • iPadOS 17.4.1 (iPad 7th gen) Link to comment Share on other sites More sharing options...
lacerto Posted March 24 Share Posted March 24 7 minutes ago, Alfred said: It really would be better if the app refused to allow an operation which is incompatible with the chosen file format. I haven’t checked whether a warning is triggered by an attempt to save a JPEG as CMYK when the existing file is RGB (or vice versa) but if not it should be! Yes, I agree. But I am not sure about the parallel case with a JPG file (when saving back keeps the CMYK format because it is technically possible). If saving back without confirming an overwrite is supported in the first place, what kinds of operations would be radical enough to require a user confirmation -- switching the color mode IS a big change so at least it is a good candidate; but there are limitless ways to completely change an existing image and it would be difficult to decide a reasonable trigger for a warning. Alfred 1 Quote Link to comment Share on other sites More sharing options...
Alfred Posted March 24 Share Posted March 24 42 minutes ago, lacerto said: Yes, I agree. But I am not sure about the parallel case with a JPG file (when saving back keeps the CMYK format because it is technically possible). If saving back without confirming an overwrite is supported in the first place, what kinds of operations would be radical enough to require a user confirmation -- switching the color mode IS a big change so at least it is a good candidate; but there are limitless ways to completely change an existing image and it would be difficult to decide a reasonable trigger for a warning. A good point well made, as they say! Quote Alfred Affinity Designer/Photo/Publisher 2 for Windows • Windows 10 Home/Pro Affinity Designer/Photo/Publisher 2 for iPad • iPadOS 17.4.1 (iPad 7th gen) Link to comment Share on other sites More sharing options...
Dominique Perchet Posted March 24 Author Share Posted March 24 I solved my problem using the following process: save as... in affinity photo format: then, the CMYK format is preserved Phew! merci pour votre intérêt porté à ma question... Alfred 1 Quote Link to comment Share on other sites More sharing options...
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