4.2.6.1.1.Method of calculation and formulaU.K.
The oil retention, from each determination (point 4.2.5.1) expressed as a % by mass of the sieved test portion, is given by the equation:
where:
m1 is the mass, in grams, of the sieved test portion (point 4.2.5.2),
m2 is the mass, in grams, of the test portion according to points 4.2.5.4 and 4.2.5.5 respectively as the result of the last weighing.