There is no standard for the shikishi 
reproduction.  The artists can start off with 
pencil first, then paint on top with markers or 
watercolor.  Or just a quick sketch with marker. 
Basically, the artists can draw or do anything 
they want on shikishi...totally wide-opened.

For the reproduction ones, same idea except it's 
just a copy of the original.  If you have good 
artistic eyes, you can tell by the paint or ink 
on the paper texture whether it's a print 
reproduction or original.