Sorry, it seems I didn't read your main question correctly so I wrote an inaccurate answer in the previous post.
Now that I understand your main question,
Let me tell you, I think it's the first time you've installed film with reels.
Why do you want to install the film in reverse?
- Even if the movie was upside down inside the cassette by accident or because of something.
- What is your problem with installing the film in the direction that makes the film comfortable during installation?
In the end, the liquids will reach the emulsion from the front and from the back, as the tank is completely immersed in liquids.
- This problem happened to me before, and I thought that the emulsion should be combined with the roller in the right direction, but after I re-thought for a while, it was correct for me that the liquids will age and surround the emulsion from all sides, so there is no sense that you are Insist on installing the film in the opposite direction.
Install the film in the direction you want the film to be comfortable, even if that orientation is wrong, don't worry about it.
- Do not worry about the issue of expected scratches, no scratches will occur,,
- What you are doing now with insistence on reversing the direction of the film, what you are doing is what could cause the emulsion to be stripped,
- Install the film with the reel and try as much as possible to install the film as quickly as possible, and if there is an opportunity to install the film in a place that is well ventilated or has an air fan, it will be better until you are sure that your hands will not sweat during installation, and perhaps if I wear gloves, this will be more useful.