Hi Christoph, On Friday 05 May 2006 02:01, Christoph Sch?fer wrote: > 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.
Good! > > > > > > > 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. > Ah... so both things are stored on the PDF: RGB/CMYK and the spot bit + colour name ! > > > 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 :) This discussion was very helpful, thanks a lot. I think most things are now clear, regarding what I wanted to understand. Best regards Gustavo -- Angulo S?lido - Tecnologias de Informa??o http://angulosolido.pt
