“American cheese” is defined as cheddar cheese, Colby cheese, washed curd cheese, or granular cheese, or any mixture of two or more of those. Kraft Singles are a “Pasteurized process American cheese food product” by staying above 51% actual cheese, with the rest being added milk, cream, or whey, or products of these.

You have to capitalize Colby, or the Colby people will send their agents out after you.

I’m half-joking. We used to have “Co-Jack” cheese but they made a huge deal about it. It can’t be called Colby if it’s mixed with anything else.