I have recently toned a batch of prints in Viradon. Despite a 30 min post-toning wash the dry prints now have a faint smell of sulphur. I have read other threads and understand that this is quite normal and that the smell should not have an impact on the archival properties of the prints. My concern is about storing these slightly smelly prints in the same box/portfolio as other, untoned, prints. Is this advisable or not?