Digital BW, The Print

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.
>