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Old 06-01-2007, 06:06 AM   #1
kinto
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Default distiller setting

Hi Guys

I'm new on the forums but have some questions for you guys hope you can help. I work with a free ads paper and print on 45 gram news print. On our pdf setting (Object level Compression) is set on "tags only" should i set this to "off" for higher quality files to send the printers.

Some images print very dark and some lose definition, could this be due to the settings in distiller?

Also can u set distiller to include crop marks on the pdf files it creates?


t.
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Old 06-01-2007, 09:02 AM   #2
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Hi
Distiller won't put crop marks on your pdf. That has to be done in the programme that's made the .ps or .eps. Distiller comes with some standard settings, try the "Press Quality" setting and see how that goes. As for the picture quality for print they have to be 300ppi (pixels per inch) to ensure a good reproduction. The darkness of your photos may be down to your monitor and the photos might actually print okay.

Hope that helps.

Doug
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Old 06-02-2007, 02:44 AM   #3
kinto
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Thanks for that Doug,

I'll have a look at the settings in our pagination software a see if i can include the crop marks from there. Some of our pictures are from the web (72dpi) (small photo ads) which i suppose dosn't help, buy we do use stock images for the front covers and bigger adverts etc.. when these print on our 45 gram newsprint they seem to loose definition and quality.

When i look at other papers that are printed on newsprint the images are much clearer, so it must be our setting in distiller that need to be checked.

In our image setting in distiller, any colour image above 300dpi are downsampled to 150 dpi, do you think this needs to be changed?

t.
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Old 06-02-2007, 05:56 AM   #4
ktinkel
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Quote:
Originally Posted by kinto View Post
When i look at other papers that are printed on newsprint the images are much clearer, so it must be our setting in distiller that need to be checked.

In our image setting in distiller, any colour image above 300dpi are downsampled to 150 dpi, do you think this needs to be changed?
Are they being enlarged? Do you know the linescreen frequency (aka LPI) used at the printshop?

There is a discussion of resolution in the article “Scanning 101: Setting the Right Resolution” at Creative Pro. There is a useful table that tells you the scan or photo resolution required to print at particular linescreen values. (Scroll down to the section entitled “Photographic reality” for photos — the earlier section is also interesting, but it applies to line art.)

   
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Old 06-02-2007, 03:09 PM   #5
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72dpi is likely not going to cut it. That's only going to support a halftone in the 35-50lpi range which basically doesn't exist in print. An old, low end, 300dpi ink jet that FM screens/dithers might do ok with that low image density but no commercial use (or any consumer work run on current generation device) will turn out very good.

If you got the images from a good web dev they probably also have a LOT of compression "quality" loss (you can get away with Quality: 3 (Photoshop, lingo) or 60-80ish (JPEG spec lingo) for screen display. ...but if you do (or someone else did) you'll DEFINITELY notice it in print (where 7-9 or 88-92 are more appropriate).

You shouldn't need 300dpi either (especially not for newsprint, even bright/heavy "weekly" stock). Something more in the 150-200dpi range will provide the detail you're looking for. Give it more and I'd wager real money that the printer/rip will just take longer to run your job as it tosses your extra data into the ether.

There are rules you can use to do the math, btw. I think Kathleen mentioned those.

While an overall darkness speaks of color management issues (mis-application, duplicate application or typically, no application). Low res images also tend to feel darker (especially in shadows) due to their inherent lack of detail. I'll wager you're symptoms describe a combination of all three factors.

JR
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Old 06-04-2007, 12:48 AM   #6
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I'd certainly change that to 300 DPI and see if it is better.
[edit] - but I stand corrected by Ben!

Last edited by LoisWakeman; 06-04-2007 at 05:45 AM.
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Old 06-04-2007, 12:55 AM   #7
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Generally, the rule of thumb for screen resolution is 2 x LPI. So you only need 300dpi if you're printing at 150 lpi. The linescreen will probably be around 105, so c. 200dpi should be fine.
Object level compresssion shouldn't have too much of an effect, but the resolution downsampling will.
If you have any doubts, use either "Press Quality", or one of the PDF/X settings, or ask your printer what they want you to use.

I'd also turn off colour management, particularly if it's just greyscale.

Curveto is right about the RIP throwin away the data - in fact over-ressing can actually make things worse!
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Old 06-04-2007, 06:45 AM   #8
kinto
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Thanks Guys for your help, appreciate it.

One more thing...anyone know of any good sites where i can get decent car images, we will be soon publishing a new car mag and i cant for the life of me find a site when we can pay to download royalty free images of cars for the front cover etc...

t.
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Old 06-05-2007, 12:58 PM   #9
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I mentioned this in your other thread but I'll drop it again here.

An old friend of mine would love to live the life of a successful motorsport photographer. While he's got the motorsport photographer part pretty well nailed I'm not sure how he's doing with the successful part.

www.fotoveloce.com is (one of) his place(s)

At any rate, give him a buzz (his name is Dave DeMartini) and if you strike up a relationship tell him "JR" sent you and tell him to get off his butt and send me a *single* email address that a) doesn't change and b) is monitored (he tends to change 'net identities as often as underwear). You also might mention that free beer could be a good substitute.

JR
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Old 06-21-2007, 01:32 PM   #10
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This is not really a DPI issue as much as it is an ink weight and sharpness issue.

If the images are not sharpened correctly and you are printing on newsprint stock, which in an of itself is very prone to huge dot gain, the images will print very flat. The total ink weight need to be carefully controlled as well.

Generally, what looks too sharp on the screen will print fine on newsprint.

If you have a 50% tone, it's likely to go up to 80% black when printed so bear that in mind when brightening the images. Images that look too bright and "washed" out generally print fine on news print.

Distiller will not influence sharpening or ink weight (make sure colour is left unchanged).
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