Thanks for pointing me in the right direction. The images are indeed CMYK. The stack is used to produce a PDF file and the printing shop requested CMYK. I just checked that last year we had indeed used sRGB not CMYK.

RObert

On 30 Aug 2017, at 16:03, Sean Cole (Pi) via use-livecode wrote:

Hi Robert,

This is likely down to the colour space the images are embedded with.
Preview will respect the colour space whereas LC will not in some cases. Make sure the jpg is saved with the sRGB (IEC61966-2.1) profile to maintain
the correct colour. And make sure it's not CMYK.

Sean Cole
*Pi Digital Productions Ltd*
www.pidigital.co.uk
+44(1634)402193
+44(7702)116447
'Don't try to think outside the box. Just remember the truth: There is no
box!'
'For then you realise it is not the box you are trying to look outside of,
but it is yourself!'

eMail Ts & Cs <http://pidigital.co.uk/emailTCs.rtf>   Pi Digital
Productions Ltd is a UK registered limited company, no. 5255609

On 30 August 2017 at 14:03, Mike Bonner via use-livecode <
use-livecode@lists.runrev.com> wrote:

Not sure if it will make a difference, but you might want to-- set the
resizequality of the img "imagename"  to "best"

On Wed, Aug 30, 2017 at 6:54 AM, Robert Brenstein via use-livecode <
use-livecode@lists.runrev.com> wrote:

I have a stack that dynamically sets the image that is displayed on a
card
using

        set the filename of img vImageName of stack vStackName to
vFilePath

I just encountered a problem with a new batch of jpeg files. Their colors change when they are displayed in the stack. I mean that when I open them in Preview, the color saturation and hue are different than when viewing
the same pic in a stack.

Anything I can do to avoid that or anything I can tell the graphics
person
to do differently when producing those files in AI?

RObert
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