The identification has to be done both on the sieve fraction (6.1) and the concentrated sediment (6.2) of the sample.

At least one slide shall be examined from the fine sieve fraction and from the fine fraction of the sediment under the compound microscope (see sections 6.1 and 6.2).

From the grinded material two representative portions shall be taken, one for the sieve fraction (at least 5 g) (6.1) and one for the concentrated sediment (at least 5 g) (6.2).

pressed, cast or otherwise condensed substances are broken into small pieces and sieved; the sieve fraction < 0,5 mm diameter is used for testing.

(b) pressed, cast or otherwise condensed substances are broken into small pieces and sieved; the sieve fraction < 0,5 mm diameter is used for testing.