Αναρωτιέμαι κατά πόσο πρόκειται για "απόπλυση" και αναφέρεται στο rinsing.
http://en.wikipedia.org/wiki/Sieve_analysis
A wet sieving process is set up like a dry process: the sieve stack is clamped onto the sieve shaker and the sample is placed on the top sieve. Above the top sieve a water-spray nozzle is placed which supports the sieving process additionally to the sieving motion. The rinsing is carried out until the liquid which is discharged through the receiver is clear. Sample residues on the sieves have to be dried and weighed. When it comes to wet sieving it is very important not to change to sample in its volume (no swelling, dissolving or reaction with the liquid).

http://www.google.com/search?num=50&hl=en&rlz=1B3GGGL_enGR25...