Digital BW, The Print

I'm using Photo Smooth Cotton, Soft Texture and Cold Press Art.  Does 
anyone have a good way of figuring out the printable side on these 
papers, other than the "lick your fingers and touch the paper" test?  
(which is what I've been doing and getting little smudges on the 
paper).  For example, I know that all Epson papers are packaged with 
the printable side facing up when you open the package from the back 
(in other words, the printable side is the side that faces the back of 
the package).  Anyone know how Innova papers are packaged with regard 
to the printable side?

(I know that, in theory, the printable side of any paper is the whiter 
side, but that doesn't help me because (a) some of these papers are 
warm and therefore the non-printable side and the printable side are 
equally "white" and (b) under tungsten light, it's pretty hard to tell 
which side is whiter anyway).