wa­ter-bead­ing-test

In the water beading test water droplets are applied to the surface of a substrate. The more greasy or oily this is, the more pronounced the beading. Clear droplet formation is an indication of an unclean surface (see illustration).

smallRetina 02:38:29 mediumAlias 02:38:29 large 02:38:29 xlarge 02:38:29