Hi Gustavo, Am Freitag, 5. Mai 2006 02:45 schrieb Gustavo Homem: > Hi Christoph, > > [...] > > > > do the above steps enable me to produce a PDF which contains the right > > > indications for a "print shop" to produce Pantone colors for me? > > > > Yes. > > > > > (even if I had to look them up on a book, and the representation > > > manually I picked for them on the screen is not very faithful) > > > > > > Can I hand over such PDF and expect them to understand it, with no > > > further questions asked? > > > > "With no further questions asked" is always a bad idea. Success in > > printing has a lot do with communication between human beings, since > > there are hundreds of uncertainties. It's almost the same as asking a > > doctor for help by describing shortly what you think is wrong with you. > > seems that I picked the wrong words there.... what I want to know, is if > such a PDF can be automatically interpreted by their workflow, if the > colors have correct Pantone names and are marked as spot colors.
Yes, it can. > > > > > > If so, the missing bit is an algorithm to display them "correctly" > > > > > on screen, right? > > > > > > > > No ink colour can be displayed "correctly" on screen. It is possible > > > > to come cery close, but accuracy is almost impossible. > > > > > > I am aware of that, that's why I used the "". I suppose "very close" is > > > what programs that claim Pantone support do... > > > > They don't even do that. Read the disclaimers! > > > > > Can you explain the difference between a spot colour and a non-spot > > > color in terms of what is stored on the PDF? > > > > A spot colour is stored as a separate colour (only the name of the > > colour) in the PDF file, whereas a process colour is stored in CMYK/RGB > > values. > > aha! Then why is it that when I marked as color as spot and gave it a > foobar name Acrobat still rendered it? If only the name was there, it > shouldn't , I think. Because in reality, you defined a RGB/CMYK colour and only marked it as a spot colour, which is totally independent from the values you entered. You can define a blue colour, choose a red one from a colour book, enter the name, define it as a spot colour, and the printer will use use red, while you see blue on your screen or on a print from your inkjet. > > > The > > developers will be able to explain the technical details better than I ;) > > > > > Sorry for not understanding at first :-) > > > > You need special software for this. AFAICT, none of them is available for > > Linux yet :( > > but this list does a god job anyway. That's what it's for :) > > Best regards > Gustavo > Cheers, Christoph
