What is the best CMYK black for printing?

Related questions

1. Why is K used for black in CMYK?
2. Is RGB good for printing?
3. Is screen printing CMYK or RGB?
4. Does RGB have more colors than CMYK?
5. What is RGB used for?
6. What is K in CMYK in UI design?
7. Can you print neon colors?
8. What is CMYK print?
9. Why is CMYK and RGB important?
10. Can you print RGB?

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2. #magenta
3. #black
4. #field
5. #follows
6. #printing
7. #combined
8. #formula
9. #feels
10. #intense
11. #actually
12. #these
13. #known
14. #result
15. #marketing
16. #considered
17. #print
18. #services
19. #colors