Please see the 4th point in this email. It is regarding the varying of density. In the last Email I couldn't mention a point. Last time when I visit the uretek they told me that if we use their gun we can't get the exact density that we want due to some technical difficulties. That means if we want a sample with the density of 50kgperm3 we can not get it exactly. We might get a sample of 48kgperm3 due to a technical difficulty.
Hope that point is useful.
Thank you!
Yours,
Pubudu Athukorala