Hi, Am So, den 25.01.2004 schrieb Stephen um 23:33: > On Sun, Jan 25, 2004 at 09:30:09PM +0100 or thereabouts, Joerg Rossdeutscher wrote: > > Am So, den 25.01.2004 schrieb Stephen um 18:03: > > > On Sun, Jan 25, 2004 at 09:11:50PM +0530 or thereabouts, Sridhar M.A. wrote: > > > > > > colors were messed up. Hunting around we traced it to the loss of > > > > transparency while exporting. > > > > > I would think so, even the Adobe apps show this behaviour. One generally > > > has better control when writing to postscript, then one does exporting > > > to file. Exporting is usually quick, painless, but with the pitfalls > > > you've described. > > > > Transparencies have not been possible in Postscript for a long time. It > > was introduced with Postscript Level 3 some years ago, but requires > > _every_ machine in a process to have a level 3 interpreter. So "one does > > not use it". > > That is simply not accurate. I work in prepress, so I'm well aware of
I'm in that business also. > the issues with transparencies. Anyone using a branded Adobe postscript > output device (not the clone rips) can do transparencies, since PS 3 was > introduced several years ago. This is a non-issue, and really is more of > a prepress knowhow issue than anything. Besides this isn't the problem > the OP is having, is it? Wasn't the question why exporting won't, but PS > will? This is unresponsible. "If" and "with most RIPs" and "original branded Adobe". I force my Co-workers always just to use PS level 1 features. No compression, always only TIF and EPS, no jpg, no LZW. No TrueType-Fonts...etc... If they care for my rule - everything works. If we really need transparencies, we immediately convert the transparent objects to TIF in Photoshop and use that. Transparencies do not work in 40% of all cases. > > A Postscript-file normally is device-dependant. So many programs that > > generate ps communicate with the device or look up informations in a > > driver what level PS they can write. So maybe your program writes level > > 3 postscript. > > > > The situation is different for an eps. An eps is made to place it as a > > part in new documents in other programs, like a tif or a jpeg. So the > > eps-writing program can not decide on what kind of machine the eps will > > be finally used, so it tries to write "compatible" eps files. Without > > transparencies. Its not a bug, its a feature. > > Hmm, EPSes are a form of postscript. Any issues with transparency in postscript > will be evident in an EPS (encapsulated postscript). No. "In the wild" Postscript is heavy device dependant. EPS is not - imagine you use a Level 3 feature in an EPS and someone has to use this eps on his Level 1 or 2 printer. It would crash/cancel/not work. So usually data is converted down to Level 1 if exporting as EPS. When writing ps it depends on the settings of the software. Some programs allow that for eps also. > > In short form: When dealing with postscript, avoid transparencies in any > > case. > > Again simply not accurate. We and many other printers in my market, do > transparencies each and every day. If a printer can't output > transparencies, run from them. They don't know what they're doing. Hell! Nonsense! There is /nothing/ wrong in a level 1 or 2 RIP. In fact they are the minority of professional devices. Most companies cannot afford to buy a new rip every some years. Those people who use Level 3 features will get in trouble earlier or later. Level 3 is in common use on quick'n'cheap poster printers etc. - but nobody is so crazy to buy a new film recorder nowadays. What if you need film? Or presentation dias? The one I worked with was level 1 and that's absolutely enough for such stuff. > BTW, many of the clone RIPS will do transparencies now. But to be > sure, one should use the more expensive licensed Adobe RIPs. Customer uses different printing company... or I have to use another one /quickly/ since mine has trouble... customer tries to use my "professional" data later in his office workflow and his old printer... agency bought a new rip for inhouse production ans it is not so "branded" by adobe... BTW: We don't have a single level 3 printer in our design agency. And we aren't that small. Bye, Ratti -- -o) fontlinge | Font management for Linux | Schriftenverwaltung in Linux /\\ http://freshmeat.net/projects/fontlinge/ _\_V http://www.gesindel.de https://sourceforge.net/projects/fontlinge/
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