Digital BW, The Print

At 05:20 PM 5/5/2002 -0000, you wrote:
>Alan-
>
>I think these discussions about print resolution get confused by 
>interchangeably using the xxxdpi term to include the IMAGE resolution 
>as well as the PRINTER resolution.
>
>There is a lingering group that still believes you should save your 
>print at some dpi setting that is divisible into the resolution at 
>which you will print for optimum output (Austin or Paul might comment 
>on this). An example would be to save the image at 180 or 360 dpi if 
>you were printing at 720 or 1440. The PRINT dpi measures the actual 
>number of dots that CAN be sprayed per inch by the printer (new 
>variable dot printers might spray less if the color warrants it).
>
>It is my belief (subject to correction by my betters) that the old 
>theory of divisibility has been debunked. I generally save at 300 dpi 
>for everything. I've tried larger numbers but can't see the 
>difference and the image files start getting HUGE.
>
>Tom O'Connell
>
>TomOC@...
>www.thomasoconnell.com
>

Tom,

I think you may be correct.  I scan 1:1 at my scanner's highest effective
optical rez, save that then output to a size that scales without
interpolation - usually around 300DPI which gives me an image height of
around 7-8 inches from a 1800DPI scan. The piezo people mention that any
odd-ball DPI conversion size makes no difference to their system. They say
also, given their druthers, 740DPI would be an excellent top output limit. 

AZ



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