This product for the toothpaste profession determination perfect pellet's special-purpose instrument, meets the GB8372-1995 standard requirement, by toothpaste profession universal use.when use, wants the first power line insertion the instrument plug, then puts through the power source. which the switch hypothesis must rub in “the predetermined hypothesis” number, turns on the power switch, the display monitor should have the demonstration. This aircraft power source is 220V (single box). Before the installment, please note inspects earths good is whether good, ensures the security. takes test specimen toothpaste 1, takes test specimen toothpaste 5g Yu Wuhen 255mm*75mm to carry on the wave plate (user to supply for oneself). Will carry wave plate to enter in cryoscope's plexiglass box and performs fixedly. Presses rubs the copper billet. Presses down “the return-to-zero” to press turns, after copper billet round-trip friction several times, (the GB8372-1995 standard requests 100 times). After the stop friction (this instrument automatic recording, stop), will take out carries the wave plate, the water used or the hot nitric acid (1:1) will carry the wave plate cleaning, will then observe this piece, should not have the scratch, if will have the scratch, explained that in this toothpaste paste body will have perfect the pellet, should sentence not qualified. continues to determine, does not change the friction number of times the words, only needs according to “the return-to-zero” according to turn then.