Well, I’ve only saved 10-20K PNGs without incidence so my experience may be more limited than yours, but I was curious about what options you’re picking in order to create a file that can’t be read back in by CS2.
Could you provide more details, as well as your platform and OS.
* *** And if you want to single out a high quality transportable file format, why not use the industry standard PDF?
Art
All my PDF applications want to down sample my hi-res images. Absolutely NOT acceptable. And galleries/printers don’t all want PDF.
I have made numerous PNG in rang of 50 – 110 Mb, non-interlaced, i.e., simplest options, PS-CS2, WinXP/sp2. Trying to reopen some gets msg "can’t parse". Size seems not to correlate. Galleries and on-line printers accept PNG, larger TIF, smaller but lossy JPG, often not PSD.
" All my PDF applications want to down sample my hi-res images."
And you can’t configure them to NOT downsample?
What about outputting a PDF directly from Photoshop? You have all the options you need for outputting a full scale, print-ready PDF from there.
Occam’s razor says to use the underlying file type, NOT PDF. The image formats I named are more widely used than is PDF, so I see zero advantage.
And I still wan’t to know why PS-CS2 can’t always read its own PNG.
i’ve never had problems and i use png all the time with photoshop. so the question is why your installation can’t always read its own png… more details would be helpful in trying to figure that out, but frankly i’m not even sure where to start debugging.
Service bureau doesn’t accept PDF?
Fire ’em…
But not before giving them an earload about how they need to drag their own sorry butts into the 21st century.
XD
imagekind.com, photobucket.com and it’s sister sites, other 3rd party printers of photos and art on demand. There the choices are JPG, TIF, PNG.
I’ve not used a "service bureau", nor submitted CMYK separations.
I’m not sure what kind of PDF applications you’re using, but all of Adobe’s have an option not to downsample or compress. And it’d be interesting to hear why you think "galleries and printers" would prefer PNG (portable NETWORK graphic), which is optimized for emedia work and tranmission, than PDF which is the world’s pre-press standard.
But then again, people keep asking for your system specifications to help with your PNG problem, but none are appearing.
Art
I thought I had posted WinXP/sp2, PS-CS2. Also, supper AMD64 PC with 2Gb RAM, mucho disk space.
Well, I tested save of PSD as PDF, found it took over 6 minutes, and multiplied PSD file size by 149.67. NO WAY can that be anything other than last choice — for me and for those gallery and printer sites I mentioned. PDF makes nice eBooks and input for POD book printers, but is not for image work.
"By the way, if you have a problem with those examples of sites not wanting anything but JPG, TIF, PNG, take it up with them."
Doooode…It’s your hassle, YOU take it up with them, for I no longer give a crap.
