I gave our screen printer JPGs of our Fall t-shirt designs to print film and get the shirts done.
This particular JPG is 1200 dpi (other shaded layers go through a linescreen filter so easier for the whole PS file, then JPG layers to be high res).
Here's my printout, both on a laser printer and then inkjet on film. Each letter has perfect, crisp edges.
And here's what they are printing. Edges are entirely pixelated. How does that happen? I could understand if a PS file and they didn't have the font, but this is a JPG. Any ideas?