If you look at Edward Hoppers painting "Nighthawks", painted in 1942, the diner which is represented has a huge curved glass window. I assume that the building was built in the 1900-20s(?). It is amazing to think that they used similar technology or alternative technology to make that window 100 years ago. Certainly no UV light to find those specks of dust.
I watched this video muted, but I can tell you the purpose of the UV light isn't to find specks of dust. The UV light is to determine which side of the glass is the "tin side". Modern glass is floated on a bed of molten tin to make the surface smooth. The article "float glass" on wikipedia will give you some information. The float method was invented in the 1950s, so a UV light to determine tin side would've been unnecessary.
Whoa. I don't get the part where they have to remove every single dust particle. I mean in that huge filthy room there MUST be dust floating around in the air and as soon as you have it wiped down more would have fallen on the glass.
+Metroidvania1981 Protagonist is talking about the workplace in the video, and he is right. I currently work for 7 years in a cleanroom, and i can say that the cleaning talk in this video cannot be taken seriously. Removing dust particles which cannot be seen by naked eye in an old shed where swiping the floor would probably cause a dust explosion.
Am I missing something? Who freaking cares if dust particles that can't be seen by the naked eye fall on window glass? They take care to ensure a clean surface. Yes, there is dust floating around. Yes, all the glass in your house is rough at the microscopic level. No, you can't see it, the glass looks as clear as, well, glass.
It’s probably one of two things. The dust would infiltrate (the manf. Eng. term not a loose word choice)the glass due to heat. For such an expensive piece why risk that. Another option is the glass release agent get thinner as the glass bends convexly in to the mold. This is less likely. I had third option but the second most likely would win me the lottery if true.
I wish the announcer would have studied the subject for a few minutes before he said such ignorant things. It isn't dust that is the problem, it is oil from fingers and other places that can permanently mark the glass if not cleaned before heating. Dust burns off at those temps. This is old technology, with my electric kilns, I just program the computer and walk away until the next day. I put the glass directly on the mold without special heating. I also don't coat the glass with release, just the mold.
I've been working in curved glass for 10 months now and we do the same we just clean the glass put it in the kiln with cold bars close it up turn it on and walk away until the next day
