Hi, I have seen a bad metal recently, if anyone have an idea what happened to the metal. Thank you.
I have a 9ct yellow gold ring from casting, it’s a flat chunky ring, I buffstick the ring from 180, 400, 600, 1200, after I finished 600, I can see there are many spots spread the ring, look like little round dots, dark colour. I guess it’s porosity, I pinned it, emery again, it’s still there, looks like it goes through the metal.
Does anyone know if its porosity, how to get rid of it. If it’s porosity, it’s from waxing or casting?