Re: [PRODIG] weird 72 ppi problem

[matthew ward]

Thanks to everyone for showing an interest in my bald patches.
On 5 Oct 2004, at 17:27, michael shaffer wrote:
I believe the JPEG definition for embedding ppi (size of print) was
established at some time between PS v5 and v6.
From memory PS 5.5 worked fine 300 ppi jpegs stayed 300 ppi jpegs.  I 
Never had 5.

On 5 Oct 2004, at 17:30, David Riecks wrote:
I noticed this "problem" about 2-3 years ago, as Quark 3 was doing 
that as well.
From what I gather, it's more of a "Quark quirk" than anything you can 
control.
From what I gather, Quark software engineers determined that anything 
with a
.jpg extension was going to be 72ppi regardless of what settings may 
have been
saved with photoshop.
Makes sense of my problem if that is also true of Q4.  I normally 
supply layout jpegs at 72 ppi so it never came up before.

On 5 Oct 2004, at 17:40, Michael Wilkinson wrote:
Has client also checked the physical size,i.e. inches
could just need resizing without resampling image checked !
Sorry I didn't explain properly, the number of pixels stayed constant.  
Quark should see a 10"x8" at 300 ppi and a 10"x8" at 72 ppi as 10"x8" 
and does if you feed it tiffs.

This quark was seeing a 10x8 at 300 ppi jpeg as a 33x41 inch picture 
causing havoc.
It was further confused by an old(ish) version of photoshop (5) 
confirming it was indeed 72 ppi when at my end it was definitely 300 
ppi.

On 5 Oct 2004, at 18:11, Mark Sykes wrote:
I can't help specifically with your problem but on a more general 
basis I
have noticed that C1 PRO 3.5.1 does something strange to parameters 
which
define file size and resolution.
AAAAAAAAH!
On 5 Oct 2004, at 17:17, Clive Bubley wrote:
Think image size in pixels rather than centimeters or inches: it 
doesn't hurt the brain so much
I do, quark won't, it thinks in percentages of length. :-(
On 5 Oct 2004, at 19:14, John Cole wrote:
Is it just the header she is opening?
No the actual file.
Thanks again oh wonderous list.
Matthew Ward
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