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Oven Chemistry - Forno Bravo Forum: The Wood-Fired Oven Community


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Oven Chemistry

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  • Oven Chemistry

    As I fumble through this curing process I have read many threads that talk about the stages the oven goes through but I am curious about the 'bricks turning white' bit?

    What is happening to the bricks to make them turn white? On my 3rd curing day the entire inside of my dome has gone black from the smoke I guess (note I have used old red bricks), should i expect these to eventually turn white with continued firing?

    Surely continued smoke = continued black? Or is it something to do with moisture?



  • #2
    Re: Oven Chemistry

    Going white, or more commonly "clearing the oven" is when the temperature is hot enough to burn off the smoke, soot and tar. The black you currently see will go away and the brick will be clean. Just like a self cleaning oven. It works the same way.


    • #3
      Re: Oven Chemistry

      If you pay attention, you can actually smell the soot burning off the bricks, the smoke will take on a slightly darker grey and you will smell the plume (not a nice smell at all). It will last a few minutes (more if you have been doing a lot of smoking and have built up a lot of soot/tar on the bricks - like I do). A raging fire doesn't produce a lot of smoke, but when the dome begins to clear, you can smell it.
      Last edited by ATK406; 09-15-2013, 07:34 PM. Reason: spelling sucks


      • #4
        Re: Oven Chemistry

        Originally posted by fourlambs View Post
        should i expect these to eventually turn white with continued firing?
        Your oven will turn red.
        The English language was invented by people who couldnt spell.

        My Build.



        • #5
          Re: Oven Chemistry

          When the black soot burns away you are left with the colour of your bricks. If they're white then the oven dome will turn white. If the bricks are red then the oven dome will turn red. The intensity of the flame will make any colour brighter and paler.
          Kindled with zeal and fired with passion.


          • #6
            Re: Oven Chemistry

            And the next time you fire it , it's soots up and the process starts again.
            Fire is in all of us, flashing up a cold oven , 2 hours later you can still have a 9 yr old attention .... Completely. You figure out perhaps its in our makeup
            Regards Dave
            Measure twice
            Cut once
            Fit in position with largest hammer

            My Build
            My Door


            • #7
              Re: Oven Chemistry

              Wise words from all of you. I hit 400'c yesterday and for a short period experienced the magic!