Dear All, We are getting spread porosity in our castings of 10K
yellow gold, which comes to notice after the piece is polished.
This is not visible to the naked eye but when seen under 10X loupe,
you can see as if something is embedded in the metal(it looks like
white patches). Also in certain places there is pinhole porosity.
Pl suggest remedies and also the causes.
Thanx in advance for all the help!!