用接触角测量来表征化纤

Cotton sheeting was tested for contact angle
and absorption using a customer supplied
ink as the test fluid. Two samples were
provided: one had a special treatment and
the other did not.
Small droplets, in the 2 to 3l volume range,
were deposited on the sample by positioning
the dispense tip just above the surface and
growing the pendant drop until its bottom
touched the sample and the drop detached.
The image below shows a typical drop just
before detachment.