Digital BW, The Print

Austin,

Since the large Epsons use 360 ppi internally, why shouldn't one say that
sending 360 ppi is 'optimal'? It avoids the driver doing any upsampling of
the image.

With the small Epsons, 720 ppi is used internally, so, although sending
images in 720 ppi should be best (?), sending them in 360 ppi is 'optimal'
in the sense that it produces sensibly-sized files and simply requires each
pixel to be duplicated in the driver upsampling to 720 ppi. Sending them in
most other ppi will be 'sub-optimal' in the sense that some pixels will be
duplicated and some won't in the driver upsampling.

You may say that we won't be able to see the difference, but that is a
different matter. Some may, and some may not. It might matter for some types
of image and not for others.

Bob Frost.

----- Original Message -----
From: "Austin Franklin" <darkroom@...>


> > A friend attended an Epson printing seminar over the weekend. One
> > piece of most interesting information that he brought back is that
> > there Is an optimal recommended printing setting : 360 DPI - a
> > submultiple of 720/1440/2880. I always expected that but never ran any
> > tests to confirm it.
>
> Yeah, but it's not true, and has been proven beyond a shadow of a doubt to
> be not true many many times.
>
> Who gave the seminar?  Could you find out?  I'd like to discuss this with
> them ;-)