[Method of Faust et al.: yield of collection through metallic loop]

The efficiency of the use of a wire loop for the removal of floating parasitic elements was investigated. The quantity of elements removed by each successive loopful was confronted with a logarithmic model which indicated that each loopful carried about 30% of the remaining floating parasitic elements. It was estimated that the first five loopfuls carried a total of 83% of the floating parasitic elements, being this adequate procedure for the method under investigation.