Thank you, this is an excellent suggestion and I shall try it. It will use a few more rolls, but I have already used 12 to reach this tentative conclusion, and it would be satisfying to see if a definite conclusion can be reached. I quite accept people's concerns that this might not be light piping nor something wrong with the cassetes, but until someone carries out such tests, we can not be sure. It could be that the yellowing in different batches has different causes - in some batches it could be old film, in others another problem, whether bad cassettes or something entirely different.
Originally Posted by Truzi
Last edited by wlodekmj; 09-28-2013 at 08:12 PM. Click to view previous post history.
Reason: Corrected spelling and explained one remark.