Digital BW, The Print

Antonis,

I agree and that is why I'm trying to find another densitometer that is  
better suited for use with IJC.

Carl

On Wednesday, June 11, 2003, at 07:09  PM, Antonis Ricos wrote:

> Since the densitometer I'm currently using
>> does not conform to any specific ANSI standards I don't think a
>> comparison of these values to ones from another densitometer would be
>> very meaningful.
>
> Carl and Phil,
>
> using a densitometer with standard density readings is essential if  
> you are
> using IJC. In this case, the discrepancy in the results or readings  
> between two
> different users would be made greater by non-standard instruments.
>
> What you get with a non-calibrated instrument is still a smooth curve,  
> i.e. when
> you plot your grayscale output it will make a smooth curve and that  
> should
> help produce nice separation between steps etc.  But you'd be missing  
> out (a)
> on achieving maximum density and (b) on proper overall gradation in  
> parts of
> the scale. That would depend on the actual shape that you would get in  
>  that -
> otherwise smooth - curve of the plotted densities.
>
> IJC is based internally on an ideal set of densities which it  
> generates for a
> given dmax and paper white set of values. If you can't track those  
> properly
> because of an out of whack instrument, you are simply missing some -  
> but not
> all -  benefits of the system.
>
> Antonis
>
>
>
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