[Scribus] Scribus and Trapping?

Stewart Noy windrunner
Wed Sep 5 08:03:36 CEST 2007

Louis Desjardins-2 wrote:
> Stewart Noy a ?crit :
>> Does Scribus currently have any tools/methods for handling trapping? This
>> is
>> a fairly new (yet another) concept for me. When does trapping become an
>> issue.
>> For instance I have many many drawings including round Bezier Curves
>> (smaller ones about 5mm x 4mm) within my doc that have a light brown
>> (R231,
>> G230, B113) colour and a black line (0.6pt).
>> Would I require trapping here? Would changing the border to say a dark
>> brown
>> (R17, G78, B7) instead of black solve this, or am I understanding this
>> all
>> wrong?
> Hi Stewart,
> Scribus currently does not handle trapping [chokes and spreads]. This 
> feature is not in the roadmap for the current development series but it 
> is included in the desideratas as "roadmap suggestions". Please refer to 
> the wiki for more details. At the same time please note that version 
> 1.3.4 has a nice addition in the color tab for overprint and knockout 
> which is an essential part of the trapping feature.
> http://wiki.scribus.net/index.php/Main_Page
> While the issue has a fair potential for discussion, and while the big 
> DTP players of this world do have trapping options built-in, trapping is 
> generally handled at pre-press level. Many printers prefer to handle 
> trapping at RIP level and will use in-rip trapping. Begin parenthesis: 
> It might be advisable to implement such a feature further downstream, 
> once the PDF is created, and not in the editing process, at the Scribus 
> level. But again, this paves the way to a nice discussion! End
> parenthesis.
> The reason for this is trapping is a specialized task for prepress techs 
> and unaware users can just do worse while being full of good will.
> A few things to consider in the case you are submitting :
> 1. Is your job going to be printed on a digital press (where trapping is 
> a minor (or not an) issue) or on an offset sheetfed press? or even worse 
> wrt trapping on a web press?
> 2. Is your job going to be printed in CMYK or as spot colors?
> 3. How small are the objects you wish to trap?
> etc.
> In any event, it would be a good idea to discuss the case with your 
> printer. For this, a color proof will be enough to help spot the 
> eventual problems.
> Hope that helps (HTH)
> Louis

Yip I'm aware of the knockout/overprint feature in 1.3.4 for which I am very
greatful :)
Well if trapping is usually handled by the printers that is fine by me, I
just wasn't entirely sure if it was usually handled more on the part of the
publisher or printers end of things.
1. It is an offset sheetfed press - their're looking into purchasing a
digital system.
3. Well the bevier curves vary in size from 5mm x 3mm to around 25mm x 30mm.

Yeah that definitely helps thanks, and I took your advice and contacted them
they said not to worry at this stage, so they don't seem too concerned -
another potential problem solved :)


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