The experiment described in this paper was performed with paraffin
(melting point range between 56o and 58oC) mixed with a small fraction
of 800-grit silicon carbide particles. Silicon carbide grains act as
marker particles for flow analysis. Sixty-two milligrams of paraffin
(56oC-58oC) with random distributed silicon particles were pressed
in a hand-driven pneumatic press for 20 sec at 50 bar and then manually
insert between two glass slides with frosted grips. Both glass slides
were coated with thin film of a liquid soap to reduce the friction between
paraffin and glass slides.