In order to obtain microscopic preparations of soils, it is necessary to give coherence to the soil samples so that they can be cut, lapped and polished.
In order to achieve the hardness required, the soil samples are vacuum packed in liquid polyester resin.
The resins harden as they polymerise, thus producing blocks which include the soil sample and conserve its natural structure unchanged. These blocks can now be treated as if they were rock samples.
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