[Product Overview] This instrument is used to measure the seepage resistance of fabrics under low impact conditions. [Related Standards] GB / T 24218.17-2017 Textile nonwovens — Part 17: Determination of permeable water permeability (spray impact method) AATCC42 ISO18695 GB / T33732, etc [Test Principle] Put a piece of weighed absorbent paper at the back of the sample, spray a certain capacity of water to the tight surface of the sample, and then weigh the absorbent paper on the back to determine the permeability, and therefore evaluate the permeability of the sample.