What are the methods for testing the hardness of Automotive Wiring Harness Protection Sleeve?

The glue is softer, and some use a hand-held hardness meter to measure it. It may have something to do with the gestures, but in general, the hardness of the glue will change, especially in the first few seconds of pressing. Sometimes when measuring the hardness, it reaches 80A for a moment, but then drops to about 76. So which one should be used as the criterion? The moment, or the drop. The hardness measurement is based on a 3-second reading. , reached 80 in an instant but immediately dropped to about 76, so I recorded it as 76; however, I still checked the average value of the product a few times to get the hardness. It was measured as 78 degrees according to the new standard, but the customer measured the instantaneous value as 82°, it is judged as unqualified.

What are the methods for testing the hardness of Automotive Wiring Harness Protection Sleeve? What is the standard when knocking hardness? Is it based on the hardness that the pointer reaches in an instant or when it is parked for three seconds? The old standard is to knock until it stops for 1 second, and the new standard is to stop for 3 seconds. However, when measuring the hardness of the car wiring harness protective cover, the value kept falling. For example: when you press it, it will be 65 degrees. After 3 seconds, it may be only 50 degrees. So, the hardness of the tested car wiring harness protective cover is 50 degrees?
The hardness of the Braided Sleeve is generally measured using Shore Hardness Tester A. When measuring, the Braided Sleeve should be used for testing. It cannot be measured directly using the Automotive Wiring Harness Protection Sleeve. The measurement of the Automotive Wiring Harness Protection Sleeve will be inaccurate. The hardness of Braided Sleeve generally has a tolerance of plus or minus 5 degrees.