Quote Originally Posted by Jim Noel View Post
regardless of the process, I always leave my negatives in a mylar sleeve while printing and eliminate the problem of ruining the negative.

I ruined one years ago, and have using the sleeve since.
Not wanting to derail the thread, but is this a common practice? I store in mylar sleeves inside paper sleeves but it had never occured to me that I'd want to print through the mylarm as that's four more surfaces that must be clean and which may or may not degrade the enlargement by introducing diffusion or refraction.