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using ash from incinerated rubbish?

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Hi there,

I was wondering if anyone had made ash glazes with ash from incinerating industrial / domestic waste? I am struggling to find any information or anyone who has done it - I assume it's possible,  it would just be great to know if anyone else has tips and tricks.

I'm not really in a position to have a chemical analysis done of my ash - if anyone had a recipe that would probably work or ingredients that I would need a lot of I would be most grateful. I am currently experimenting with variants on these two recipes; https://ceramicartsnetwork.org/docs/default-source/uploadedfiles/wp-content/uploads/s3/sites/5/2016/06/07173023/harryspring-p13-pmi-06.pdf and https://glazy.org/recipes/49264. It would be most economical for me to be able to fire at cone 6. 


Many thanks,


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Hi Hannah and welcome to the forum.

I've never used ash from domestic waste but your post has made me curious. I did a quick google search and found a fair bit of info on Municipal solid waste ash. From one study the main components found in it were Si, Al, Fe, Mg, Ca, K, Na, Cl, SiO2, Al2O3, CaO, Fe2O3, Na2O, K2O. But also found in the fly ash were the heavy metals, "Cr, Cu, Hg, Ni, Cd, Zn and Pb are the most commonly found in MSWI ash, and Zn and Pb usually exist in the largest amounts (fly ash and bottom ash..."

For a comparison a general generic analysis of wood ash from Hamer and  Hamer would be  8 Na2O, 17 K2O, 12 MgO, 27 CaO, 1 Al2O3, 24 SiO2, 7 P2O5, 4 Fe2O3

The heavy metals lead, cadmium and mercury found in domestic waste ash testing done in the link (below) I pulled this info from would be an area of concern. 


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