View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0006107 | Scribus | Color Management | public | 2007-08-18 12:02 | 2008-05-18 14:13 |
| Reporter | cbradney | Assigned To | |||
| Priority | normal | Severity | feature | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Product Version | 1.3.5svn | ||||
| Target Version | 1.3.5 | Fixed in Version | 1.3.5svn | ||
| Summary | 0006107: Decide on small standard color set for 1.3.5 release | ||||
| Description | R G B C M Y K etc etc | ||||
| Tags | No tags attached. | ||||
| Patch | |||||
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Please add Rich Black with the following values in the short list : 100K - 60C - 40M - 40Y |
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Basic set now in SVN.. test and request additions as you like. |
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Hmm, I asked some printers over here, and they only use additional C (between 30 and 70%). |
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Back in the time of films, I remember there used to be one mix: 100% Black and 50% Cyan. Now that we have CTP and material and time is not an issue anymore (wrt stripping), we find mixes such as the one I suggested earlier. I think the most important is to set one rich black and put a clear tooltip about what can be done and what should be avoided at all cost. We want to avoid total ink 400% like we see sometimes. I suggested this mix according to a few printers here. I browsed a few "GATF-like sites", and others, and couldn't find any "authorities" on rich black. So I ended up suggesting a well-known and neutral mix here. Adding C only will of course give that black a tint of cold! Really, it depends. One of the idea behind rich black is to carry less ink as to not destroy the tones in a picture nearby, for instance. |
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Hi, I'm not a specialist, but wouldn't it be good to add Orange and Green to comply with the hexachrome CMYKOG colour set ? It seems some printers can use it. BD |
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CMYKOG belongs to Pantone. It is a trademark and it is patented, as far as I can tell from http://en.wikipedia.org/wiki/Hexachrome |
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And Hexachrome export isn't supported by Scribus (yet) anyway. There's a separte RFE for it: http://bugs.scribus.net/view.php?id=4641 |
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And to add a bit of theory here, I understand that in a hexachrome color space, you don't really make use of the Orange and the Green as such. Instead, it allows to work in RGB and with the help of 6 colors instead of 4 on press you can reproduce 1) the RGB gamut and 2) more Pantone spot colors than with the regular CMYK (which is actually pretty bad at reproducing PMS). I don't know how successful hexachrome is on the market. You need 1,5 times the plates you'd need for a regular job (more material, more time, more cost) and you ideally want a 6-color press, which is not uncommon but you won't find that on each corner. Plus, 6-color presses are often used not for hexachrome but for other printing options. My bet is this is a very specialised niche. |
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OK I have added Cool and Warm Blacks as well. these seem to be the three most common. |
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OK, trying to backport this is difficult. It is fixed in 135svn. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2007-08-18 12:02 | cbradney | New Issue | |
| 2007-08-18 12:02 | cbradney | Status | new => assigned |
| 2007-08-18 12:02 | cbradney | Assigned To | => plinnell |
| 2007-08-18 12:02 | cbradney | Relationship added | child of 0005693 |
| 2007-08-19 15:29 | christoph_s | Relationship added | related to 0006122 |
| 2007-08-31 20:56 | louisdesjardins | Note Added: 0017231 | |
| 2007-10-01 22:48 | cbradney | Note Added: 0017501 | |
| 2007-10-02 00:57 | christoph_s | Note Added: 0017504 | |
| 2007-10-02 03:34 | louisdesjardins | Note Added: 0017505 | |
| 2007-10-08 17:24 | brunod | Note Added: 0017554 | |
| 2007-10-08 17:42 | louisdesjardins | Note Added: 0017556 | |
| 2007-10-08 17:57 | christoph_s | Note Added: 0017557 | |
| 2007-10-08 18:24 | louisdesjardins | Note Added: 0017559 | |
| 2007-12-20 22:52 | cbradney | Target Version | => 1.3.5svn |
| 2007-12-26 17:02 | cbradney | Target Version | 1.3.5svn => 1.3.5 |
| 2008-04-29 20:49 |
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Note Added: 0019568 | |
| 2008-04-29 22:52 |
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Note Added: 0019573 | |
| 2008-04-29 22:53 |
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Status | assigned => resolved |
| 2008-04-29 22:53 |
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Fixed in Version | => 1.3.5svn |
| 2008-04-29 22:53 |
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Resolution | open => fixed |
| 2008-05-18 14:13 | jghali | Status | resolved => closed |
