in my new job I am doing some point of sale design but I come from a textile/fashion graphics background so some of the technical stuff Im not really confident with.
I am doing some big (900x2600mm) window drops with a photographic image on them - what is the smallest resolution I can get away with - what is ideal for this size?
The girl before me used to set up the file in illustrator and paste the image on and stretch it to fit with the resolution dropping down big time as shes scaling it (then pdf it) - is this way ok to do it? Some of the images I have seen in these files end up with resolutions such as 40 - 60 ppi which i would have thought was too low but im assuming shes gotten away with it for this long...
anyway if someone can shed some light that'd be great and any extra info you can add to help me...go for it!
Generally for large format printing you'll get away with anything 150ppi and upwards. Perhaps a little less if they're not gonna get too close.
I would up rez the images in photoshop and try and fix them the best you can, then relink them into the illustrator file. Printer rips dont interpolate, you're just gonna get big-ass pixels.
Here's what I do at work if I wanna get a quick idea on print resolution.. turn on your ruler in illustrator, then adjust the zoom till ruler measurements are approx the right size, ie 1cm = 1cm. If it's looking pixelated at that level, the printers not gonna do you any favours.
As a last resort, whoever's doing your printing should be able to check the file out before they print, and advise you whether it'll be too pixelated or not, so hit em up if you're unsure.
Remember that people will rarely stand any closer than the height of the image - and you would be amazed what you can get away with. 100dpi would ube more than fine I'd say. Obviously the higher the better but don't sweat too much over it, would be my advice.