Zizindikiro zoyesera zomwe zimagwiritsidwa ntchito nthawi zambiri ndi njira zomatira zotentha zosungunuka

   Zomatira zotentha zosungunukaali ndi zisonyezo zambiri, monga mtundu, fungo, zonyansa, kukhuthala, kufewetsa, ndi kutenthetsa komwe kumamveka pakugwiritsa ntchito guluu tsiku lililonse. Kununkhira ndi zonyansa zimatsimikiziridwa ndi malingaliro a anthu, ndi zina zimameta zida ndi miyezo yofananira.

 

Mtunduwu umatsimikiziridwa poyerekezera ndi colorimeter ya Gardner. The mamasukidwe akayendedwe amayesedwa ndi viscometer malinga ASTM D3236-88 miyezo, monga Brookfield, Nirun, etc. ambiri ntchito mafakitale; mayeso ochepetsera amadutsa GB/T15332-94 ndipo amafewetsedwa ndi kuyeza kwa theball Point tester; Kukhazikika kwamafuta kumayesedwa mu uvuni molingana ndi GB/T 16998-1997.