1. Color / Composite black (YMC) means you will print black color using Yellow / Magenta / Cyan ribbon panels and prints dark color of grey.
2. Color / Resin black (YMCK) means you will print black color using Black ribbon panel and prints dark color of black.
3. Monochrome (K only) means you will only use one color. if you are using YMCKO ribbon. it will only print Black color.