🚀 go-pugleaf

In article <8912020336.AA21356@crayola.cs.UMD.EDU> meuchen@GRAD1.CIS.UPENN.EDU (Paul Eric Menchen) writes:
>
>In article _ frontah@PAWL.RPI.EDU (David J Sotnick) writes:
>>I have a two-page document in Pagemaker on the Mac and I am trying
>>to get my grey-scale 256 shade 300 dpi scans to come out looking like a real
>>picture on the Linotronic 300 set to 2540 Lines/inch.
>>
>>I tried to do this and I got a terrible result on my scans - they were all
>>screened really badly. They had dense dots all over them. What am I doing wrong?
>>
>My printer can't take more than about 90 lpi because it can't be
>resolved for printing.  Lpi and dpi are not the same thing.
>Try setting your lpi to somthing like 90, maybe a little less, and then
>print. If you want finer detail and don't need to copy or print, try
>something a little higher, but not 2540.  If you do need to print,
>talk to your printer and ask what he can take.

Ah, the great confusion between SPOTS per inch and DOTS per inch.  The 
printer's dots created by the screening process are described in lines
per inch (screen ruling), while the resolution of the printer is best
described as spots per inch.  The latter are used to create the former.
David's problem is not that he is outputting at 2540 spi (or dpi if you
want to stay confused),  but somewhere else.  First,  I missed the
original article so I don't know how he obtained the image (from a scanner?), 
but the lousy output might really be lousy input.  If the image is known
to be good (i.e. someone made it look right on another system), then
something my indeed be wrong in the output part.  Is the image being 
scaled up at output time?  What screen ruling and angle did you choose?
	Of course, as a good employee of AGFA Compugraphic, I can tell
you the real problem is the choice of imagesetter.  Send me a disk David
and I'll see if it looks better on one of our machines.

F
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					Rob




-- 
Rob Bradlee  w:(508)-658-5600 X5153  h:(617)-944-5595
AGFA Compugraphic Division.    ...!{decvax,samsung}!cg-atla!bradlee
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