Microwave oven has sparkings on a mug!

[niwaz_malik]

hi, what causes the sparks on a mc oven, when the mug is made of dried mud?

 

[thelivingflesh]

there must be some linings of gold ribbons on the mug. usually made to keep it intact. they are not aaaaaa.compatible with it.

 

[guruofchem]

definitely some metal in whatever mud was used to make it - microwaves be not happy with most metals...