Does lava set signs on fire?

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I was trying to make a mob farm, but I made it too short. I remembered that you can use lava to burn the mobs, and I thought about a way for the mobs to go through a block but the lava wouldn't (so the drops don't burn). Then I thought of signs, but now I'm worried that the sign will burn because it's made from wood.
Does lava set signs on fire, or can I safely do this?
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Can signs catch fire from lava?
It won't.Does lava set things on fire?
Lava generated next to flammable blocks can naturally ignite fires. Fire spreads quickly across flammable blocks, and can spontaneously ignite when flammable blocks are near lava, even though many blocks that should be flammable cannot catch fire from nearby lava. Lightning strikes can also set fires.How do you make lava not spread on fire in Minecraft?
The simple solution is to correct the format of your command: its doFireTick, not fireTick. Anotehr solution is to cover the lava with a non-flammable block such as stone, dirt, or barriers.How far can lava set blocks on fire?
Lava can set flammable blocks aflame in a 3x3 square directly above the lava, and a 5x5 square above that, so take that into account when you're building a lava trash can in your wooden hut.What If 2 Drops of Lava Fell On Your Body?
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Images: Pixabay, Uzunov Rostislav, Anete Lusina, Karolina Grabowska