The major differences in films industry wide is the subbing or lack thereof for each application. Kodak makes unsubbed and subbed film supports. You can buy subbed or unsubbed supports from ICI in England for a variety of applications and IIRC, Ilford buys from ICI.
Ron, what exactly is "Subbing"? This is the first time I have heard the term used in regards to film...
"I always put my fb prints in a filled aquarium on the wall.
No problem with dry down times..." APUG'r Willie Jan