Digital BW, The Print

> From: Steve Kale [mailto:stevekale@...]
>
> So density is always a negative number?  I thought we talked about density
> figures as positive numbers eg a dMax of 1.64.  In Roy\ufffds
> calibration doc he
> has numbers like 127, 121, 131....  (I am taking the middle
> number from the
> Sample spot measurement in the XYZ space using Measure Tool\ufffds Spot
> Measurement function ie a dark black is producing a y value of around 2.0)

No, L values go up to 100, for 100% reflectivity or transmissivity. If you
poke in L values that are less than 100, the log will be negative, so
negating it gives you a positive value.

	D	L
	0	100
	1	38
	2	9
	3	0.9
	4	0.09

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...