JJG (Light Industry) 68-2000 "Paper and Cardboard inks absorbency tester trial verification procedures" specify the verification requirements of the tester, including first verification, follow-up verification and in-use inspection. The tester is used to evaluate the inks absorbency of paper and Cardboard, according to the technical requirements of GB/T 12911-1991. The procedure describes in detail the main technical parameters of the instrument, such as the running speed of the ink wiping table, the thickness and area of the ink coating platen, and the time of wiping ink. Verification includes Appearance inspection, operation performance verification, Safety protection function test, etc., to ensure the measurement accuracy and Reliability of the instrument. A verification certificate will be issued for qualified instruments, and a notice will be issued for those who fail. The verification period is generally one year.