temperature - Can UV light make us invisible?

For an object to create different EM waves, it needs to increase the temperature, so what if we or some material could be so hot, that it would emit ultraviolet light, and thanks to that be invisible for the human eye.

I have a lot of questions about this and I would like you to answer me.

1. At which temperature does an object emit UV light?


2. If an object emits UV light, we wouldn't see anything or we would see some type of violet light?


3. Is there any material that can get to that temperature without melting?



4. Is there any powerful insulator?

Thanks for reading this, and for breaking my dream of making someone invisible, I invite you to day-dream and imagine stupid questions.