Copper in 1865: Electrorefining · 390
density 8.96 g/cm³, heat band 1085 °C, and fire letter A1 metal. Copper is sold as grades, not as a single sub Scores compare Copper with the rest of the atlas on strength, heat, fire behaviour, insulation, workability an Read the condition on Copper before the nickname. Year 1865, line “Electrorefining,” figure 99. Declared performance after blowing-agent or moisture drift. A material is what it is made of, the condition it survives, and where it goes afterward. Copper under “Electrorefining” in 1865 should say which, with 99 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.
Scores compare Copper with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates. Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.
Copper (Cu) is a family of grades whose density 8.96 g/cm³, heat band 1085 °C, and fire letter A1 metal. Copper is sold as grades, not as a single substance. Chemistry Cu, density 8.96 g/cm³, heat band 1085 °C. This atlas treats Copper as a system: mill route, coatings, tests and the cavity it sits in.
Conductivity note: ~400 W/m·K. Insulation score 6/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: A1 metal. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide. Origin: Chalcolithic / industrial electrorefining 1860s, Cyprus / global. The process chapter follows feedstock → conversion → forming → finish → install.
The label keeps Copper, 1865, and 99. “Electrorefining” is the condition on the figure.1865
Figures to keep
- Year of the condition
- 1865
- Property figure
- 99
- Material
- Copper
- Use line
- Electrorefining