[scribus] Black and blacker.

[Stéphanie Vilayphiou]

On 27/10/2010 18:37, Gregory Pittman wrote:
> On 10/27/2010 12:11 PM, John Culleton wrote:
>> I am correcting a cover file built by someone else. The author wants a
>> certain line of white text on black background covered up. No problem
>> using a rectangle. But to get the rectangle to match in Scribus I need
>> to use a new color of about 96% K. That makes the rectangle match in
>> Scribus but unmatch in acrobat reader. A rectangle of pure 100% black
>> does fine in Acrobat Reader but is noticeably blacker in Scribus.
>>
>> I am using the latter choice. But only the proof copy will tell for
>> sure.
>>
>> The original artist used Photoshop at some point in the process. Who
>> knows what black she or he used? However it is interesting that a
>> black background which is jet black in Acrobat Reader shows up as a
>> very dark gray in Scribus.
>
> we have had this sort of discussion before:
>
> http://wiki.scribus.net/index.php/What_is_Rich_Black%3F
>
> The casual user has to become aware that there is Black, and there is 
> Black. Intuitively, people want some absolute blackest of black in 
> their output, but as Louis indicates in this quoted ML post, there are 
> technical issues that come about with heavy use of a single ink or 
> adding CMY to a lot of K.
>
> In the end, ask your printer.
>
> Greg
>
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It depends if you plan to print CMYK or direct tone. If direct tone, 
then I usually make a new CMYK color with C0% M0% Y0% K100%. In CMYK 
thought, rich black is more intense. The amount of ink depends of the 
paper you're printing on (check the paper characteristics, or use ICC 
profile of the paper (it will automatically lower extra ink), or just 
ask the printer). For example, Arctic Papers makes their ICC profile 
available, for each type of paper. 
http://www.arcticpaper.com/en/UK-Local-Site/Services/ICC-Profiles/

I know in Indesign there was a functionality allowing to see extra ink 
(we could choose the amount of ink). It's very convenient to check a 
file before printing. Is this something you plan to implement in the 
next versions? (I have 1.3.5)

S.

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Stéphanie Vilayphiou
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