It might be that these few things weren't done correctly.
First,use the right ink.Different manufacturers use different ink formulas,resulting in significant differences in color performance and stability.It is strongly recommended to use the ink specified by the equipment manufacturer.Don't try to save money by using off-brand ink—if it clogs the nozzles or causes color shifts,repairs will end up costing even more.If your machine doesn't have an automatic stirring function,be sure to shake the bottle thoroughly before adding ink to prevent sedimentation,which can lead to uneven color.
Second,always use genuine software.Pirated software often has chaotic color management and unstable data transmission,making it prone to errors.If you switch to non-original ink,you must recalibrate the colors and create new curves—otherwise,the colors will definitely be off.
Third,check the nozzle condition.If the nozzles are clogged or a particular color isn't flowing properly,the overall color effect will be affected.
Color quality depends half on the equipment and half on the details.If you take care of these details,then the color effect produced by your printer won't be bad.