We have a document that we save as PDF for printing so CMYK is required. I am currently inserting a picture as a background for a one page document – a JPG – and it is in a
We may provide an option in Aspose.Words API in future to use CMYK color space for the entire PDF document (including the images). Your thread has been linked to the appropriate issue (WORDSNET-17065) and you will be notified as soon as it is supported. Sorry for the inconvenience.
The issues you have found earlier (filed as WORDSNET-17065) have been fixed in this Aspose.Words for .NET 25.12 update also available on NuGet.