Platinum crucible manufacturers provide cleaning methods for platinum evaporating dishes and platinum crucibles

After prolonged use, there will be a thin layer of crystallization on the surface of the platinum dish, which must be removed in a timely manner to prevent it from penetrating into the interior

It can be boiled in dilute hydrochloric acid or dilute nitric acid. Hydrochloric acid is about 1-1.2mol/l and should not contain oxidants such as nitric acid, nitrates, halogens, etc. If it cannot be cleaned with dilute acid, use potassium pyrophosphate, sodium carbonate, or borax to melt and clean. If there are still stains or the surface turns black, use 100 mesh fine sand (sea sand) without sharp edges to moisten with water and gently rub to restore the surface luster. There are many polishing agents that can also be used now.

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