How Thermal Mass Changes the Behavior of a Kapton Heater

https://thermal-design-insights.moderncairn.com/posts/ito-glass-heater-integration-tips-for-transparent-equipment-surfaces

In precision instruments, a kapton heater must deliver heat in a controlled way. It uses a resistive foil circuit laminated within polyimide film. One useful trait is custom circuit patterns. Still, hot spots can change the result