Glass in : Ageing
Read the condition on Glass before the nickname. Year , line “Ageing,” figure 2. Fillers and moisture change resistivity more than brochures admit. A material is what it is made of, the condition it survives, and where it goes afterward. Glass under “Ageing” in should say which, with 2 tied to the condition. A figure with no condition is a boast. Readers meet the name on the back of a product, so the code and the history should not share one sentence.
This atlas treats Glass as a system: mill route, coatings, tests and the cavity it sits in. Conductivity note: ~1 W/m·K. Insulation score 28/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: A1. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.
Origin: Mesopotamia / Egypt; float 1959, Near East → St Helens. The process chapter follows feedstock → conversion → forming → finish → install. Uses span buildings to defence / safety. Pairings matter: technical-ceramics. Circularity mark 70/100. Ask which scrap, which certificate, which year.
Related atlas entries, a short glossary, and three threads that keep Glass honest. Crystalline cousins that do not flow like glass. Glass wool is the fibrous insulation form. The usual fire wall next to glazing. Transparent insulation research vs IGU. EN 13501-1 reaction-to-fire letter (A1–F), not a wall rating.
The label keeps Glass, , and 2. “Ageing” is the condition on the figure.2
Figures to keep
- Year of the condition
- 2
- Property figure
- 2
- Material
- Glass
- Use line
- Ageing