I am looking for methods of improving the quality of monochrome prints that I produce on a Canon Pro-10s printer when printing directly from DxO photo lab. Typically the density of the last 5-10% of the blacks require fine redistribution. This can be achieved through a quality ICC profile or other techniques that involve converting the image profile and then assigning a profile.
A simpler method is to use a curve type correction which is applied just before the image is sent to the printer. At the moment I do this by sending the image to Affinity Photo and then applying a curve as described. I wonder if there is any way of creating a curve or other correction that may be saved and applied to each image before printing directly from within DxO.
I suppose my question is how does DxO react if two or more saved presets are applied to an image i.e. does the second cancel the settings made by the first?