Review on 🍪 Matfer Bourgeat 310101 Black Steel Oven Baking Sheets: Perfect for All Baking Needs! by Anthony Juat

Bought and seasoned according to directions on their website. Continued to bake bread with seeds in the oven 350 degrees. The pan deformed at this temperature but flattened on cooling. When I took the bread out of the pan, the whole bottom was covered with a blue coating. It came off when I scratched it with a knife. The blue lightened from the pan that held the bread. The raisins in the bread ate through the browning. What does that thing put on my food? I don't think it's heat treated but some kind of chemical coating. Called the company a week ago for answers. I sent you a photo of the pan. Said they would come back with me. I'm still waiting. I'm sending it back. Just got a call from Matfer. They said it was the blue coating compound they applied to those sheets. I can't say what range. Very worrying. Will buy JB Prince Revain half size black steel skillet. JB Prince called and was told it was black steel only. It also cost less.