For that first pass theough the oven I suggest that you drop the temperature down to 425F and set the time at 10 to 15-minutes. Since the flash point of most oils is about 435 to 440F this will help to prevent the introduction of any unwanted excitement into your life as your oven begins belching fire and flames and triggers your fire suppression system. Don’t ask me how I know about this.
After the first pass, you can go to your normal baking temperature. In fact, I recommend this as it sets/hardens the seasoning. As you continue to use the screens, they will continue to darken over time. Do not soak the seasoned screens in water to clean them as this will cause the seasoning to come off in large pieces, much like a bad sunburn. If this happens, you will need to strip the seasoning off of all of your screens and statr all over again.
Tom Lehmann/The Dough Doctor