I recently discovered and purchased in a local flea market an "ancient" sealed small pack of Agfa papers, named Agfa Celloidin CS3. It contains 10 9x12cm sheets and also "Autovireur blanc mat" is written on. I had never seen them before while I couldn't manage to find any reference on the net. Thus, could anyone contribute any information about them? Do you think that it's worthwhile to open it or even try to print 'em? or it's better to leave the pack sealed as it is almost certain that the papers are useless after a long time unused?