QA number：14517
QI need further information about the measuring unit for viscosity.
A
Poise, cP, cps, etc. are usually used as measuring units for viscosity.
In recent years, international unit (SI unit) is used as weighing unit and it has been changed to Pascal second (Pa · s). Typically, millipascal seconds (mPa · s) are used as a practical unit of viscosity. Stokes (St) used for kinematic viscosity (ν) have been changed to square meters per second (m2/s). Square millimeter per second (mm2/s) are used as a practical unit. The smaller the viscosity value, the less sticky is the product.
【Viscosity】
1P = 1dyn・s/cm2 = 10-1Pa・s 1cP（or cps）= 1mPa・s
【Kinematic viscosity】
1St = 1cm2・s-1 = 1cm2/s 1cSt = 1mm2・s-1 = 1mm2/sc