PE,
I take your point. All my Emulsions contain ethyl alcohol and most contain some Triton X200. But the vast majority of of glass I use dose sustain a standing sheet of distilled water until the water evaporates..
I have noticed that most antique boxes of glass plates contain glass that is low in green color, compared to today's standard plate glass. This indicates lower Iron content.
I do find it interesting that any sheet of glass which will hold a vertical sheet of distilled water NEVER,EVER frills upon processing.
Bill