How to calculate concentration % from refractometer readings
The refractive index of each cutting fluid is different, but there is a relatively accurate method.
Buy a 0-32% refractometer, configure 5% cutting fluid dilution, and read with a light meter, then the refractive index of this cutting fluid is 5%. Daily, calculate the concentration according to the reading of the refractometer, add some water if it is high, and add cutting fluid if it is low.
The general recommended method is to add 5% for the first time, and add 3% each time after that, and use it in a cycle. With this method, after a lot of practical operations, it can basically ensure that the daily use concentration is 4- 6%. It has a lot to do with whether the amount of cutting fluid taken by each worker is accurate.
