Digital BW, The Print

Thanks, Seth. I too check whiteness using sunlight. But I bought a box 
of Infinity Arches paper, which turns out to be creamy, and certanly 
not as white as HPR or Epson's watercolour paper. sigh. 
Andrew

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Seth" <seth@m...
> wrote:
>  Although they imply whiteness on most commercial packaging, I 
believe it is
> a measure of "brightness" regardless of true color.  I have held 
some of the
> papers side-by-side that have the same ISO numbers, but appear to be
> different shades of white.  Some of "whiteness" will depend on the 
lighting
> and OBAs.
> 
> I check white in pure sunlight or an Ott light. Flourescent has that 
green
> cavity and incandescent will warm the appearance of the paper.
> 
> Not a great test, but take it to a paint department that has 
different
> lights for looking at their paint chips.
> 
> Seth
> 
> ==-----Original Message-----
> ==>Is ISO brightness a measure of whiteness?
> ==