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Adobe Illustrator question
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Zinfari:
Anyone know how you setup dimensions in Adobe Illustrator.  Apparently (and after I think about it it makes sence) pixels and dots are different.  So I'm creating my CP overlay and using 150 pixels per inch for my drawing (as I wanted a resolution of 150 dpi).  When I go to print it's about 4 times larger than than I think it is.  (really dont need a 16' CP  ;D)  Anyone know how to set up printing so 150 pixels = 1 inch?

Thanks,
-Zinfari
TazMan:
Not certain I quite understood the question; but, here goes:

It sounds like when you're printing the document it is much larger than you anticipated?  In Illustrator I work at 100% scale. That is, if my CP is 27"w x 14" h.  I set my document size to those dimensions.  Anything you create in Illustrator itself will be vector line art - therefore the dpi isn't really an issue.  Any raster (jpeg, tiff, bmp, gif, etc) images you place in Illustrator are what they are.  That is, if you have a 300 dpi tiff image that is 3" h x 3" w and you place that in your Illus. document, it would remain at 300 dpi as long as you don't alter the image size (ie enlarge or reduce).  Again, I have found it easiest just to work at 100% scale for any raster images (like in Photoshop).  So, if I need a 300 dpi image that's 8" h - that is what I create and then place into Illustrator.  Did that make any sense?
Zinfari:
Yea that makes sence and that's what I thought I did.  What happened is that I asked around about what resolution you should create your CP layout at to get good results.  Most folks said that 150 dpi was the way to go so I did.

The problem is that I assumed that pixels=dpi.  So I now have a control panel that is 46" x 20" or 6900 x 3000 pixels.  I didn't see an option for inches when I created the image with pixels.  Now in opening a new drawing I see that 1 in = 72 pixels (I created a new 1 in x 1 in drawing and it was 72 pixels so i need to scale my image 150 to 72...

Thanks for the help I just never tried to put in inches... should have, but didn't.  I got it now.

-Zinfari
Amra:
I use Photoshop, so Im not sure about Adobe illustrator, but I can tell you this much...

DPI is not the same as Size... DPI is Dots per Inch, meaning you can have 120, 300, 600, even 1200 DPI in a 1" x 1" square.

300 is good quality, 600 is great quality, and 1200 is Super High Quality!

Personally, if I was going to do an Overlay, I would do it at 600-1200 DPI, the only problem with doing it that high, is the file sizes are HUGE.  

For example, a 27" x 15" picture, at only 72 DPI is 6 Megabytes, while the same picture (27" x 15") at 300DPI is 104 Megabytes, now go up to 600 DPI, your at 417 Megabytes, meaning the one picture alone you are going to have to burn to CD to get it printed at Kinkos.  Wanna know how much 1200 DPI is for that same Image?  Let me put it this way... only 1000 DPI at 27" x 15" is 1.15 GIGA Bytes.

Now, what does all that mean?

Well, ill show you... Please print each of the next three images, now if you open them, they will appear diffrent sizes, yet when you print them, they will be the exact same size, so dont worry about wasting ink, they are only 1" x 1"

Image 1, at 72 DPI

http://207.76.168.55/upl/72dpi.jpg

Image 2, at 300DPI

http://207.76.168.55/upl/300dpi.jpg

Image 3, at 600DPI

http://207.76.168.55/upl/600dpi.jpg

Also, the reason the higher resultion images are larger on the computer is becuase your Screen goes by DPI as well, your resolution determines your DPI, if your desktop is 800x600 then you have a total of 480000 pixels, now a 1" x 1" image at 300 DPI is about 90000 pixels, meaning that a 1" by 1" image at 300DPI on a 800x600 Resolution will take up about 20% of the onscreen image, that would be about 5.5" of a 19" monitor, even though it is only 1" x 1" when printed....

As you can see, after you print those three pictures, that you will want at least 300 DPI for any image you use to print.  Anything less (even 120) is going to print pixelated and grainy.

Hopefully this has helped you understand the diffrence between the DPI and the Size of any given image.
Zinfari:
The problem that I have is what resolution is Illustrator printing at or how do I set that?

Under document section there is an Output Resolution that seem to logically make sense, but I figured if I changed that the graphics would change as well... but they haven't..

Hmmmm

Anyone know for sure?

-Zinfari
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