Here's the thing, Photoshop is a pixel based program, so in complete black and white 6 * 3.9 metres doesn't mean anything.
Having said that, print work (flyers / business cards etc.) uses the commercial standard of 300dpi. Translating that to that format would give a ~70000*~45000 pixel file, which would be around 9 gigs of file size for just the blank pixels - from the top of my head, could be a GB or alike off.
Having that said, banners - specially sized 6*4 metres - are made to be seen from a distance and not required to be printed at 300dpi. So I'd really recommend to find out more about that with the business that's going to translate your file to a real banner (as half the dpi would mean a quarter of the total pixels, making the file actually workable - not to mention easier to find source material to create your banner image on a high quality.)
I'd also recommend checking the file your bannerprinterguy wants, as various printing techniques used in those actually prefer an AI file.
Which brings me to the alternative - work in on a small sized image but use vectors, as those can be scaled up without losing quality. Note that working with vectors also requires some calculating power from your pc.
So in short: get all the info you can get from the place you want your final product to be made and make decisions based on that.
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Bart J.A.H. de Brouwer |
