Method and device for determining solid particle surface energy

A method of determining solid particle surface energy, the method comprising:

• placing solid particles in a container made of a very high surface energy material;
• pouring a liquid into the container;
• tilting the container to drain out from the container a first subset of the solid particles floating at a top surface of the liquid;
• tilting the container to move the liquid away from a second subset of the solid particles that are below the top surface;
• tilting the container to move the liquid back toward the second subset of the solid particles such that at least a portion of the second subset of particles floats at the top surface of the liquid;
• tilting the container to drain out from the container the portion of the second subset of the solid particles now floating at the top surface of the liquid;
• and
• determining the surface energy of the solid particles based on an amount of the first subset of the solid particles and the portion of the second subset of the solid particles.