Thermoactive sign for a radiator. It visually informs us in a simple way whether the radiator is currently heating or not.
When the radiator is cold, the sign is red and the inscriptions on it are not visible.
When the radiator is hot, the sign turns white and the inscriptions on it become visible. The "Hot" information sign is visible.
It is a useful thing at home and office.
The inscription is made of two pla filaments. The bottom is made of thermoactive pla. The inscriptions are made of plain red pla.
I used PLA Spectrum 1.75mm Thermoactive Red.
The profile is set to manually change color using a pause inserted on layer 16.