Qualitative Analysis Filter Paper/buchner Filter Paper,Oil Test Paper,100pcs/pack (9cm)

• 1, oil spots for state four levels: no clear boundaries between the deposition area of oil slicks and diffusion regions, a uniform color throughout the oil patch, oil ring light and bright. Can be determined: good quality oil. Class
• diameter have 9cm 
• 2: deposition ring color depth, wide diffusion ring, with a clear dividing line, as a yellow oil ring at different depths. It can be determined: oil contaminated oil can still be used. Three: deposition ring dark, dense sediment, narrow diffuser ring, oil ring darken. It can be determined: oil has deteriorated. Four: only the central deposition ring and oil ring, no diffuser ring, ring black sediments deposited thick dense and thick, easy to dry, dark yellow and light brown oil ring to be judged

 whatsapp:

+8615827495590

my email :

love122440@163.com