Digital BW, The Print

Hi Lotusm50:
I think you're making things much more complicated than they really are. 
Remember that Photoshop and any other competent image processing program can 
resize to any desired size and resolution (within the limits of available 
memory). I work in  Photoshop and I simply set the size to the dimensions I 
want and the resolution to the appropriate level (I had been using 300 with 
no problems but 360 seems to have some advantage) and let the program 
resample the image to match. In other words say I want 4.75 inches x 6.8 
inches final print size (which I did recently for replacing a faded "5x7"). 
I plug one of the dimensions (4.75) in to the Image/Image Size dialog box 
with 360 dpi as the resolution and check Constrain Proportions and Resample 
Image: bicubic and let it run.
There are lots of options, of course, but that's the basic drill.
Hope this helps...
Bert

katzung1@...
www.astronomy-images.com
www.visionlightgallery.com/katzung/

----- Original Message ----- 
From: "Lotusm50" <LotusM50@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Saturday, September 17, 2005 10:54 AM
Subject: Re: [Digital BW] 300ppi vs 360ppi


What I don't get is, does this mean that you can really optimally
print only 4 or 5 different sized prints for a given file.  Say with a
given file you can print an 8x10 print at 720 ppi.  Then say you want
to crop it differently leaving the file smaller by 15%.  Does that
mean you can't print the file at the 8x10 size because it would no
longer print at 720 ppi (or 360 ppi)?  Or odes the printer dricer
automatically re-size file sent ot the printer to the optimal
resultion for the printer.  It would seem quite odd to me that a
proffessional quality printer would be so limited in effective print
sizes.  Or is the quality difference between printing at 360 ppi and
320 ppi in fact almost impossible to see?  I don't think I ever try to
print at 360 or 720 ppi.  I take the file as it comes and if I want an
8x10 or an 11x14 I print it to that size (using 1160 with CIS &
Piezotone inks).  I never really see any problems with the resolution,
detail, or quality of the print.

What shouls I be noticing in a print not printed at a multiple of 720
ppi that I am not seeing?


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Bob Frost"
<bob@f...> wrote:
> Steve,
>
> I haven't printed at some of those resolutions, but I always
understood that
> the numbers should be factors of 720ppi, the ppi that the printer
uses for
> printing, not the dpi. So 360ppi is OK, as is 240 and 180, but not
480 or
> 576. Easy to confirm by printing a set of black and white 1 pixel
lines and
> looking for the aliasing patterns. Many give you a lovely 'tartan' like
> print (for those of you who know of Scotland).
>
> Bob Frost.
>
>