That's correct. Scratches on the surface of glassware renders the item relatively useless for precipitation. Gold has a way of adhering to the scratches, and can be difficult to remove. I always used pristine beakers for precipitation. Once marked in the least, they were demoted, used for the first operation, dissolution of base metals after inquarting.Noxx said:Harold recommends ''BonAmi''.
It does not scratch glass.
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