Can negatives be damaged by long term contact with eachother? Here's my problem: After developing and making contacts of rolls of 35mmTri-X, A&I labs here in SoCal returns processed B&W negs in a small acid-free envelope with the negatives cut up and placed on top of each other inside the envelope. Other labs I've used have actually placed the negs inside archival sheets before contacting them and then returning them in the sheets themselves. If possible, I'd like to leave them untouched until I need them, so can I leave them the way A&I delivered them without worrying about long term archival? Thanks!