Sample test instruction for easy undertand
1. Take a bottle (not less 500ml), carve the bottom of the bottle,
wrapped the bottleneck with a piece of filter cloth tightly.1.
2. Put silica gel into the bottle, the height of the silica gel should be
3-4 times of bottle diameter or not less than 10cm, then put
another filter cloth above the silica gel.
3. Then put black diesel oil into the bottle slowly in case oil pour out.
4. Wait clear color oil out to the bottom bottle.
Note, the oil can’t include too much water, acidities and corrosive.