[clue-tech] gimp fonts for [printed] graphics

[Jef Barnhart]

When I was in printing, offset lithography. DPI was the true dot per
inch, in one inch there was 300 dots or however many you specified. Now
this is true for monochrome, black and white, printing. Oh, 300 DPI
printing is very hard to do, and yes I have printed at that level. Most
print shops do about 180 - 200 DPI. Four color as most shops do, is
still true DPI. The effective DPI is DPIx4(200x4=1800). Hexachrome
printing, 6 color printing, at the last time I saw this, uses FM(?) for
the layout of the dots. Not a true DPI, the colors are frequency modulated dots.
Check out Pantone's web site for more details.

The shop that I worked at had a drum scanner that would to prints and negatives. Used a Unix backend, I think that it was SGI.

As for cameras, digital has a ways to go to duplicate the quality of film. In my opinion.

Jef

On Thu, 23 Dec 2004 10:19:00 -0700
"Jed S. Baer" <thag at frii.com> wrote:

> On Thu, 23 Dec 2004 10:05:04 -0700
> Jeff Cann wrote:
> 
> > > I do all my artwork for Linux Format magazine (and probably
> > > Tux too though I don't think they've specified the requirements
> > > yet) at 250 DPI.  That works out well since a typical screen shot
> > > of a GIMP window gets down to about 1.5" to 2" on a page, which is
> > > good sized for an article.
> > 
> > I'm a bit confused.  Do you set your monitor DPI to 250 or the DPI
> > of your new images to 250?  I'm assuming the latter, but please
> > confirm. The reason I'm assuming this is because I didn't think you
> > can change the DPI of a monitor - by I'm totally ignorant about this
> > stuff[obviously].
> 
> Heh. You're right. You can't change your monitor. Printers can change
> their effective DPI in various ways. Some years ago, inkjets were
> using some "partial dot" sort of thing to get greater effective DPI.
> It was kind of a dithering sort of thing -- I don't recall the gory
> details.
> 
> Think of it this way. If you create an image that's 3 inches and 100
> DPI, and print it on a 300 DPI printer, it'll be 1 inch on the page,
> unless you specify some other scaling in the transition from your
> computer to the printer, such as telling the printer to use 200 DPI.
> 
> The 250 DPI Michael mentioned probably has something to do with the
> resolution of the print technology used by the magazine, but I'm just
> speculating there. Here's a little factoid. Back when National
> Geographic switched to digital image processing (which let them move a
> Pyramid, if you recall that little kerfuffle), they used 2400 DPI
> scanners, because otherwise the quality wasn't up to their standards.
> I wish people who make wild claims about how good their 3 megapixel
> camera is would realize the nature of statements like those.
> 
> jed
> -- 
> http://s88369986.onlinehome.us/freedomsight/
> 
> ... it is poor civic hygiene to install technologies that could
> someday facilitate a police state. -- Bruce Schneier
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