How Thermal Mass Changes the Behavior of a Kapton Heater

https://glass-heating-technology.image-perth.org/how-an-ito-glass-heater-combines-transparency-with-surface-heating

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