I have an image I need to print on black shirts but it was given to me as a grey scale. I was wondering when I set it to halftone what the best settings for degrees and lines per inch would be if I were to use a 255 screen with out it coming out pixelated.
Unless you are printing it yourself, I would give the greyscale image to the printing company and let the company choose the appropriate halftone settings. Or at least ask them for their recommendations.
But for a single colour print, I can't think of any reason why the screen angle should be anything other than 45 degrees.
I'm printing it myself in the print shop I work at. It's a personal side project so I'm in charge of the graphics and film.