Digital BW, The Print

Hi Duane,

Thank you very much for your reply :)

I have found several calculators:

kale's one:
http://www.brucelindbloom.com/index.html?CompandCalculator.html

and:
http://www.colorpro.com/info/tools/convert.htm
http://www.forret.com/tools/color.asp

But I don't really know how to use them regarding my need...

J.

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus" 
<dlruckus@...> wrote:
>
> Hi Joe.
>  You could just use the Green density readings as a relative measure
> of B&W K by  using a Density to Lab_L* formula as given here by S 
Kale
> recently. Search on the words Kale,Excell and Density to find his 
post.
>  The results would not be exhaustively accurate but should suffice 
for
> most needs.
> 
> Regards
> Duane
>   
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "joejx8"
> <joejx8@> wrote:
> >
> > 
> > Hi,
> > 
> > I am intended to buy an old/used densitometer. I have seen a 
model 
> > which seems to measure only R,G,B *density*. 
> > 
> > Is there a mean to get a BW *density* value (by calculation) from 
R,G,B 
> > density values... I was thinking at a formula like DBW= 0,7*DR + 
0,2*DG 
> > + 0,1*DB  (values are just for illustration) ?
> > 
> > Thanks !
> > 
> > J.
> >
>