EPS10 file size mystery

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cajoer
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Posted Sun Aug 19, 2012 8:20AM

I bought an EPS10 vector the other day, that consisted of around 80000 anchor points and lots of transparency effects, but the file size was was just an astonishing 4 MB.

Just as an experiment I tried to resave a copy of the file (EPS10 again of course) and that new file was over 700 MB. What the heck? I didn't change anything in the file, nothing had been rasterized and I didn't include any raster thumbnails. So what's the trick? 

(Yes, I did send a sitemail to the creator about it, but I'm impatient... haven't recieved an answer yet.)  
TheRealDarlaCLOSED
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Posted Sun Aug 19, 2012 8:53AM
Are you having trouble using the file? 
cajoer
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Posted Sun Aug 19, 2012 12:16PM
No, why? I would just like to know how to save a small EPS10 file. Apparently there's some way to do it, that I don't know of.
diane555
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Posted Fri Aug 24, 2012 10:38AM

I can't explain how the exact same file would be more when you re-saved it. It would be a great tip for folks who use lots of transparencies.


I did try a couple of test on my own files that had transparencies. One thing that made a big difference was to reduce the physical size of the elements. I took a drawing that was about 100 pixels high and reduced it to about 400 pixels and it reduce the file by 50%. I only tried this on a couple of files.
cajoer
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Posted Fri Aug 24, 2012 11:50AM

Yeah, that was the tip from the creator of the file as well - make the artboard (and the artwork of course) much smaller. For some reason it doesn't seem to do any difference with the file that I bought, but I've tried other files and managed to lower file size with around 75%. 


However, I can't get anyway near 4MB if the file consists of tens of thousands of points and some transparency effects. Maybe there's a difference between different Illustrator versions when saving EPS.


 
bortonia
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Posted Fri Aug 24, 2012 1:04PM
Possibly! I have access to CS4 and CS5, if you'd like me to try resaving the same file to see what happens? Let me know, I'm curious if there's a difference.
Andrea_Hill
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Posted Fri Aug 24, 2012 3:50PM
Reducing the artboard size is a great tip! I'm going to try that. I always seem to struggle to get my file sizes down, but I do use large artboards so maybe that has been the problem all along! Thanks guys!
cajoer
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Posted Sun Aug 26, 2012 3:51PM
Posted By bortonia:
Possibly! I have access to CS4 and CS5, if you'd like me to try resaving the same file to see what happens? Let me know, I'm curious if there's a difference.

The file isn't available at iStock, but thanks anyway! And I have CS3 so I tried saving the same file in CS6 and CS3 and the EPS10 file created in CS3 was actually a few megabytes smaller. Would be interesting to try saving a file in Illustrator 10 and see what size the file would get. 
cajoer
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Posted Sat Sep 8, 2012 9:44AM

Found Illustrator 10 on Ebay so now I have tried to save the file in Illustrator 10, and the result was a file just under 4MB, instead of the 700MB file that CS6 created.

Unfortunately my happiness didn't last long, because when I tried saving a few other files as EPS10 and compared them with the EPS10 files created in Illustrator CS6, I found that CS6 sometimes made the files smaller. So it seems to vary depending on what the file contains, and how it's made.
tygraphics
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Posted Sat Sep 8, 2012 12:06PM
A difference of 696mb is huge. My first thought would be this is from an added raster preview for a huge area of pixels.
.
Some things to consider when comparing the difference between the save files:
1. How big (in inches or your favorite unit of measure) is the area of the art board?
2. Consider scaling the vectors down to a smaller area & see if that makes a difference.
3. Try saving with the preview turned on, then off. See if that makes a difference too.
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