The "paper" refers to that it is paper in some meaning. Is it safe to write with ink or with pens and pencils on the wrong side of a rc paper, the white backside, so that the ink does not slowly enter the picture on the emulsion side and damage it? I have Forte rc papers, Hungarian I think and not so well known brand. This rc paper curls quite strongly, the only negative thing I´ve found about it in my work. Does not obey my orders when I say "stay flat!"