In your opinion can I send it to the service ?
Ross (Windows Xp Sp2, Pentium P4-3Ghz, 1Gb Ram)
1200 dpi is far too much resolution for a plotter print, imo. If you consider that 300 dpi is enough for the images that you see in offset printed magazines, you'll find that you're working in too high resolution. You can even low the resolution more if the viewer distance will be more than a meter. Usually, a 200 dpi print is more than enough for a sign that will be viewed at 2 meters. If you view the artwork at more distance you can use 150, 100, even 75 dpi. I'd recommend you to just try to print in your inkjet printer a part of the file using, for instance, 300 dpi and watch the print out at the distance that you'll watch the real stuff. If the detail is enough, then you don't need to raise the resolution that much. Usually the resolution of printers/plotters express how fine are the ink drops that the machine can achieve, but it doesn't necessarily mean that you need to create a file in that resolution.
Of course I'm talking about images (bitmap images, complex artwork with effects, transparency, blending, etc.) If you need to print small text the resolution counts, although is recommended to keep small text as vectors, to prevent aliasing related artifacts. The printer will use its best resolution for vectorial data. But even in that situation, if you have to print rasterized text, more than 600 dpi is quite excessive.
hth, Gez.