Oh, my God! This is monochrome black sulfur! If you want your black to be particularly black, it must be four-color black (cmyk should be a little bit). Generally, companies looking for recipes will know which black one is the best! I don't know exactly! The reason why your pictures are so different is actually very simple! The machine is different, the color is definitely different, not to mention your color value is different! Even if the color values are the same, there are differences when printed by different machines! Why is there such a big difference? It is estimated that there is no color chasing when printing! Next time there is such a suggestion, first print a color with an ink printer, and the printed color is close, about 95%. If you want an ink printer, the color difference of the laser is a bit large, generally around 85-90%! In fact, plastic film mulching also has a certain impact! I hope I can help you!