[scribus] Slower printing with grays

Sveinn í Felli sveinki at nett.is
Wed Oct 30 08:58:32 UTC 2013

Þann mið 30.okt 2013 07:42, skrifaði Rolf-Werner Eilert:
> Am 29.10.2013 15:59, schrieb john Culleton:
>> On Tue, 29 Oct 2013 11:43:30 +0100
>> Rolf-Werner Eilert <eilert-sprachen at t-online.de> wrote:
>>> Currently I'm working on a little brochure in b/w made for
>>> being printed on our copier.
>>> When I have gray elements (gray letters or gray polygons) on
>>> the pages, they will print much slower than pages with only
>>> 100 % black elements. The difference is big: instead of
>>> "instant" print, it will take 4 - 8 seconds for the RIP to
>>> make up the page. I know, printing pictures is slower, too.
>>> But here there are only homogeneous gray areas.
>>> My first thought was, I had cloned some gray colours out of
>>> the CMYK black one (with the K slider to 50, 60, 70 %).
>>> Making
>>> RGB colours out of them didn't help, however.
>>> Is there any way to speed up printing such pages?
>>> Rolf
>> Have you tried saving the file as pdf and then printing that
>> file from e.g., Acrobat Reader or (for Linux) Okular?
> Yes, this is precisely what I do here: Making a PDF and
> printing it from Okular or KPDF or Reader + kprinter.
> I've been printing a lot of documents made with Scribus to
> this copier in the last years, and I know a bit the results
> in advance. Once a month, I have to print A3 duplex
> containing some pictures, inline pdf, or gray areas, and
> that takes about 12 - 15 seconds for each double page to
> start printing.
> But simple A4 has always printed (almost) at once, with some
> second or two delay when there are many pictures on the
> page. So this is new to me, and I will have to print this
> new document more than once. It would be nice if I could
> find out the reason and speed it up a bit, because it will
> have to print duplex and at least 10 copies of about 12 - 14
> pages when it's ready.
> Does the way the colors are defined have any influence on
> printing output to "Grayscale" printing? This was the only
> idea I've had what made be "wrong". If making e. g. a 60 %
> gray by defining it via the CMYK view (K slider), will the
> printer have to recalculate the CMYK definition to RGB or
> something like this?
> Rolf

Is it possible that the printer/copier has (several) 
built-in rasters (pattern types) and that some time is 
necessary to calculate which one fits best for the gray shade ?
Recall vaguely a laser printer I was using years ago where 
this was the case if one didn't define in the driver 
interface which raster type to use.

Just thoughts,

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