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printing problems

i'm working on a poster.the final size is 29"x48".the printer output is 150 dpi.i have scanned images in at 30 dpi.i am working full size and my files are to big to manage(300mb)can i lower the resolution on the mac?can i work 1/2 size?i don't know if i have any other choicesplease help me
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pufftube
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pufftube
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macmediaCommented:
I'm not sure what you are printing to, but I have an Encad printer (36" width, 300dpi Ink jet).  With this printer, if you have a tiff that you need to print at 29" x 48", a good resolution for this or an HP printer would be around 125 DPI which will result in a file size of 83mb at CMYK.  Output will be quite sharp and satisfactory (providing the scan is of decent quality and you correctly use the Unsharpen filter in Photoshop)

If you are outputting this on an imagesetter and going to an offset (sheetfed) press, then you will have a large file - 266dpi, 133 Line screen, CMYK, - 376mb.

You don't really have too much leeway from the size of the appropriate printing means.  If you lower the resolution from the above values, then you will be sacrificing on the quality - the values shown are perfect for the prints.

I hope this helps

Kent
Mac Media
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