It's a standard way to ensure that different printers print the same colour for branding purposes (unless of course, one is large enough to formulate and dictate one's own colour à la Coca-Cola and their red).

c.f.,

https://www.goodreads.com/book/show/1928117.Four_Colors_One_...

(or some similar text on 4-color process)

And of course, we all owe a great debt to Willis Carrier whose efforts to regularize temperature and humidity for the sake of consistent and accurate printing colour reproduction resulted in the invention of air conditioning.