A file (0~1000) ml/min, B file (0~5000) ml/min, C file (0~10000) ml/min, D file (0~100000) ml/min (B, C, D file are optional gears)The standard specimen test is 10 +/- 0.2 cm ², and the specimen needs to be larger than this size.
We mainly use it for cartons purchased by the factory, and the quality department checks whether the Hardness meets the standard.
The commonly used materials are mainly the more conventional corrugated pit paper