Troubleshooting Slow Heat-Up in a Mica Heater System

https://heater-design-center.capitaljays.com/posts/where-a-mica-heating-plate-can-be-used-in-industrial-machinery

In heated plates, a mica heater must deliver heat in a controlled way. It uses a resistive heating circuit supported and insulated by mica. One useful trait is high-temperature capability. Still, mechanical stress can change the result