[Scribus] pantone colors

[Kernow Craig]

Wikipedia has a good entry on spot colours at
http://en.wikipedia.org/wiki/Spot_color
(now with a mention of scribus alongside its proprietary counterparts)

Gustavo, it may be helpful to read the printing entry on wikipedia too
as that has muc background info on the many aspects and processes of the
many methods of printing... it probably won't answer your question
however i t will certainly give an indication of the complexity of any
and every printing process. http://en.wikipedia.org/wiki/Printing

Kernow



Gustavo Homem wrote:
> 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
> 
>