Surface
| Washing method |
Label and protective film
|
Clean up with warm water or mild detergent and alchol or organic
solvent in case of adhesives |
| Easy cleaning case such as
dust |
Clean up with soap, warm water or mild detergent |
Rainbow figure
|
In case of being caused by excessive detergent or oil, it
can be removed by warm water or neutral detergent |
Discoloration by welding heat
|
Clean with 10% nitric acid solution or hydrofluoric acid,
neutralize with ammonia solution or sodium bicarbonate and rinse
with water |
Fingerprint
|
Clean with soft cloth dipping into alcohol or organic solvent
like ether and benzene and rinse with water |
Fat, oil and grease
|
Clean with soft cloth or paper and clean with neutral detergent,
ammonia solution, or special detergent |
Burnt organic matter and carbide
|
Dip in hot water of neutral detergent or ammonia solution
and then clean with detergent containing soft abrasive |
Rust caused by external pollutant
|
Wipe with oxalic acid, sulfuric acid, nitric acid solution
(10%) and clean with detergent containing abrasive |
Bleach and various acid materials
| Rinse immediately, dip into ammonia solution or sodium bicarbonate
and then clean with warm water or neutral detergent |
