[Therion] PDF generation

[Wolfgang Zillig]

Hello Bruce,
I was this year at a producer of large format printers on a trade fair. 
There I got a cave map printed (size approx 1m by 1.5m. He opened the 
pdf in Photoshop and rasterized it with 360 dpi. That file was printed 
afterwards. Quality in my opinion is great. He said, that photoshop is 
best for this job, and this is more reliable than letting the printer do 
it.
For saving pixel files for printing I would recommend to either use 
photoshop native format or "tif" with lzw-compression. This is a 
losseless compression. jpeg and png are either lossy and/or limited in 
pixel size.
Best regards
Wolfgang

Am 21.03.2013 23:35, schrieb Bruce:
> I have (in my small experience) not yet found a large format printer/driver
> that can reproduce therion generated fill areas reliably.  Almost always get
> recessive hazey dotty rectangular areas, and the transparency settings are
> ignored.
>
> I have tried converting to jpg and png but usually going up to 150 dpi
> crashes or locks things up, and when 150 dpi does work, while the file looks
> OK on screen, the quality of the printed output is so bad as to be unusable,
> so I go back to using the original pdf.
>
> I'm working with approx 5MB pdf files that print about 600-1000mm x 2000mm,
> and sometimes up to 10MB.
>
> Regards
> Bruce
> -----Original Message-----
> From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On Behalf
> Of Martin Sluka
> Sent: Thursday, 21 March 2013 8:58 p.m.
> To: List for Therion users
> Subject: Re: [Therion] PDF generation
>
> Graham, the best way to print maps from Therion's PDFs is to render them to
> pictures. I do it in Photoshop. It could be really huge file.  Don't render
> to too high resolution. For A1 150-180 dpi in final size should be enough.
> RGB/CMYK problem should be solved if one sets the color space of PDF as sRGB
> in printers software.
>
> Martin
>
> Odesláno z iPhonu
>
> 21. 3. 2013 v 8:18, Graham Mullan <graham.mullan at coly.org.uk>:
>
>> I am having one of our surveys printed professionally as an A1 poster and
> a couple of issues have arisen that it is worth users being aware of. One is
> that the printer's software had a problem faithfully reproduced some fill
> areas, mostly stal flow. They solved it but it is worth keeping an eye out
> for this as some small areas might easily be missed.
>> The second is the lack of control over colour - not the usual problem of
> being able to control which colours it uses if asked to colour the whole
> survey - which I believe is being looked at - but the seeming fact that the
> output will be coloured RGB when printers require CMYK. I know that Acrobat
> Distiller can deal with this and generate appropriate files, but I cannot
> see a way of doing this in Therion.
>>
>> Graham
>
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