[thelist] photoshop print ready file (not the web)

[Andy Warwick]

On Tuesday, October 15, 2002, at 04:12 PM, Jason Bauer wrote:

>> -----Original Message-----
>> From: thelist-admin at lists.evolt.org
>> [mailto:thelist-admin at lists.evolt.org]On Behalf Of Andrew Maynes
>> Sent: Tuesday, October 15, 2002 6:20 AM
>> To: thelist at lists.evolt.org
>> Subject: RE: [thelist] photoshop print ready file (not the web)
>
>> Does it matter what the pixel dimensions are?  Because it was when I
> changed the
>> dpi the pixel dimensions changed alot even thought the cm stayed the
>> same,
>> apologises for being a bit stupid on this area.
>
> The size of the image is determined by the DPI (dots per inch) and
> Pixel
> Dimensions. You mentioned that you are at 300dpi, so every 300 pixels
> take
> up one inch of space. If you were at 70dpi, it would only take 70
> pixels to
> take up one inch. This is why when you raise the dpi of an image, you
> get a
> larger pixel count, but the actual printed size of the image stays the
> same.
> Its also why images with a higher dpi look better when printed, because
> there are more pixels to show more detail.

If you want a *very* detailed look at the distinctions between pixels
per inch, dots per inch, lines per inch, screen rulings, etc. see the
sample chapter of Dan Margulis' book Professional Photoshop available
here:

	<http://www.ledet.com/margulis/PP7_Ch15_Resolution.pdf>

It explains very clearly why you need print files to be of a certain
resolution, and how you can sometimes get away with slightly smaller
files and *still* get better quality.

HTH

--
Andy Warwick
Creed New Media Design, Nottingham, UK
<http://www.creed.co.uk/src/evo/index.htm>