The water-testing cream is a creamy white paste-like mixture that turns purple-red when it comes in contact with water.
The reaction speed is fast, the demarcation line after the reaction is clear, and the duration is long. It is suitable for all petroleum products, sulfuric acid, nitric acid, hydrochloric acid, ammonia, soap, salt and chloride water content measurement.
The test ointment is a bright pink paste that turns bright red when it encounters gasoline, diesel, naphtha, kerosene, crude oil, aviation kerosene, and hydrocarbons (hydrocarbons),
Insert the ruler vertically and slowly to the bottom, being careful not to sway, you can press the ruler to the top by hand.
If the bottom of the ruler is smeared with water-testing cream, leave it for more than 10 seconds.