Gypsum plaster
Jericho and Egypt used burnt gypsum.
Placa de gesso · Painéis de gesso di-hidratado que compram tempo de fogo ao calcinar.
Placa de gesso did not arrive as a finished commodity. Sackett 1894; US Gypsum 1916 around United States still explains who makes it and which tests it sits in.
Ten dated points, five eras and three milestones below are the spine — not a complete industrial history.
Jericho and Egypt used burnt gypsum.
Paper-faced gypsum panels in the US.
US Gypsum brands the wall.
Speed over lath-and-plaster.
Glass fibres in core for fire assemblies.
12.5 mm as the module.
Green / blue boards, still not exterior grade.
European board types (A, F, H, D…).
Multiple layers for EI 60–120.
Closed-loop from jobsite offcuts in some markets.
Jericho and Egypt used burnt gypsum.
US Gypsum brands the wall.
Glass fibres in core for fire assemblies.
Green / blue boards, still not exterior grade.
Multiple layers for EI 60–120.
Speed over lath-and-plaster.
Green / blue boards, still not exterior grade.
Closed-loop from jobsite offcuts in some markets.
Knowing this timeline is how to read a mill certificate without treating Placa de gesso as timeless.
Meta-aramida da DuPont: fardas de bombeiro, papel elétrico, carvão sem gotejamento.
Geral 65 🧯Tintas que incham em carvão isolante: R no aço sem placas grossas.
Geral 58 🌡️Fibras refratárias a 1000–1400 °C: fornos, juntas, e o alerta respirável que AES tenta aliviar.
Geral 62