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).
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.
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.