Digital BW, The Print

At 10:01 AM 5/5/2002 -0400, you wrote:
>> >Austin,
>> >
>> >Knowing printer command language, you have got to be the wizard who knows
>> >what the 240 dpi limiting figure I'm asking about pertains to.
>> >
>> >
>> >thanks,
>> >
>> >AZ
>> >Maker of Lookaround panoramic camera.
>> >http://www.panoramacamera.us
>> >         or
>> >keyword.com lookaround
>> >
>> >
>>
>> Hey wait a minute...
>>
>> Could it be that the 240dpi figure had to do with the eyes resolving power
>> and not anything to do with the printer? In other words below that the dot
>> pattern become too noticeable for most viewers?
>>
>> AZ
>>
>> Maker of Lookaround panoramic camera.
>> http://www.panoramacamera.us
>>          or
>> keyword.com lookaround
>
>Hi Alan,
>
>I have no idea what 240DPI "limiting figure" you are talking about...since
>that is certainly not printer imposed...but probably dither pattern imposed.
>The Epson dither pattern may in fact have a cap at 240DPI, I don't know and
>haven't run any experiments (and really have no need to)...but when using
>the Epson driver in grayscale, it only uses ONE ink, the black ink...and the
>dither pattern would be pretty large (look like TMax 3200, coarse and chunky
>;-).  I do know, for a fact, that when using the Piezo driver, I can see
>differences in prints up to over 480DPI...so that "limit" isn't part of
>Piezo (or the physical printer).
>
>Regards,
>
>Austin
>


Austin,

I found this on the Piezo "knowledge base" pages:

"5 - So what is the optimal resolution?  I can say that 72 DPI is way too
few.  We sort of drew a line in the sand and said that minimum is 240 DPI."  

Must be where I saw it first although I have seen the same number mentioned
in other discussions - probably based on the same source.

My next question is whether the 240dpi line in the sand is a general rule
that applies to other drivers???  Where I am going with this is to find a
general printing/scanning work flow recommendation for lower rez scanners.
Something like: 
"scan at the maximum optical resolution so that your output at whatever size
is 240dpi or better without interpolation."  I'll have to explain that the
240 figure is arbitrary but based on practice.


AZ
  
Maker of Lookaround panoramic camera.
http://www.panoramacamera.us
         or
keyword.com lookaround