It all depends on how the heat is. If it's right above the stove... everything will warp.
Bubblex is kind of like coro, but it's more of "bubbles" in the center than flutes... which makes it much sturdier. It's also a smooth surface... which makes the prints look nice.
It is a plastic...so it will likely warp over time. But your customer is asking the impossible. Unless he wants aluminum, maybe alupanel, everything will warp when mixed with heat + humidity.
Bubblex is kind of like coro, but it's more of "bubbles" in the center than flutes... which makes it much sturdier. It's also a smooth surface... which makes the prints look nice.
It is a plastic...so it will likely warp over time. But your customer is asking the impossible. Unless he wants aluminum, maybe alupanel, everything will warp when mixed with heat + humidity.