yesterday night I fell asleep forgetting to give the bread the final shape, so the dough prooved on a silicon pad that was slightly oiled. Since it was too late to do a second proofing I decided to bake the bread in my gas oven directly on this pad, that is supposed to withstand 230°C.
Well, the bread came out great, but ... it was as if I had baked it on a pizza stone preheated to 500°C! the bottom was completely burnt and the crumb was much dryer than usual. Generally I bake at 230° from cold oven for 50 minutes on a baking sheet and there's no burning whatsoever, so this deterioration was surely due to the silicon pad. The pad itself had several burns that I couldn't wash away.
What are the characteristics of that silicon? I considered it a very bad conductor, but evidently it conducts heat *very* well, too well. Is it different from ordinary silicon?
I thought I could try to see the effects of a (new, the old one is now gone) silicon pad on the bottom of bread baked in a convection oven (where there's no lower heater).