Calculating grain fineness so far is an exercise which, requires a serious amount of precaution and a skilled person to conduct the test. Check out the video how we have redefined calculating Grain fineness number (AFS Number) after sifting. We do recommend buying ASTM E11 and ISO3310-1 compliant sieves.
And here is a photograph of the equipment!
Grain fineness calculation apparatus
Have a question about your sand?
Tell us what you are testing, and we will point you to the right method, guide, or instrument.