Using only 2 colors in photoshop?

[semperaggie]

I am making a black and white mailing label but it has lots of shades of gray. How do I get so it is exactly only black and white so I can upload it for printing?

hope this makes sense

thank you

[kenw]

not sure how PS does it, but in PSP you simply decrease color depth to 2. It may get a bit funky as it will vary as to which shades of grey it decides to make white and which it makes black. Best way is to create it from the start as 2 color.