High-quality black-and-white photographs of large old machines and tools

[Toolmaker51]

That would be SOME product Corrugated glass! Haul that into the local window guy "yes, I'd like this little bathroom window re-glazed with THIS" right before whipping it out of the box......
Anyway, I think the wrinkles appear as it slides/ rolls out, almost like making home made pasta, has to be cradled and laid out to dry. Factory wise, the methods are completely automated.
I'm far behind in google quests; satisfying those (+ me) who want to know.