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suzannajean

Black mold on Wood/underside of plates

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The humidity is consistently producing a significant layer of mold on the underside of my plates.  They need to dry for over a week, so it’s plenty of time for a whole ecosystem to grow.   Unfortunately, the black mold often stains the clay all the way to the completion of the glaze fire. 

Im using a birch plywood to build them on.  It is untreated. Does anyone have any advice on how to treat the wood so I dont have to deal with this issue as much?! When I was working at another studio and using their boards, I rarely dealt with this. Now that i’m using my own boards consistently, it’s a major issue.  Plus, black mold is just scary looking. 

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Spray the board with hydrogen peroxide to kill the spores that are all over it.  Impressive that it's able to stain through the glaze fire, the mold must be concentrating metals (which is common in fungi). 

I'd say killing the source is the only way to really control it, but mold spores are pervasive so control is about as good as you'll get.  Can you flip them every day so that the mold doesn't have that moist stagnant surface to grow into?

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What cone do you fire to o8?Have to belive it makes it thru a glaze fire.What is the clay body??

you could switch to boat plywood -there are a few choices but most haane mahogany as a skin outerside which will not be prone to mold or wetness issues.Ash and birch are not good wet choices.

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22 hours ago, suzannajean said:

the black mold often stains the clay all the way to the completion of the glaze fire

Really unusual, I've never heard of this happening, curious to know if anybody else has had this happen? @suzannajean, could you post a picture of one of the glazed plates and a bit more info on your clay and if you are firing it to maturity?

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