However the focus should be to determine what is causing the itch. If it is dry skin, then a good beard oil or beard balm will help to moisturise the skin and hair. When applying the oil or balm, it is a good idea to draw it upward from the bottom of the beard, against the grain. Brush it up against the grain several times before patting it back down.
Filtration is commonly the mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass.The fluid that passes through is called the filtrate. Filtration is used to separate particles and fluid in a suspension, where the fluid can be a liquid, a gas or a supercritical fluid. 2  Depending on the application, either one or both of the components may be isolated.
Gravity Filtration: As it is called, this method uses gravity to reach the goal of separation through filtration. The most familiar technique is probably filtration of a solution through a paper filter held in a funnel, allowing gravity to draw the liquid through the paper.oncept: Filtration is a technique used for two main purposes. The first is to remove solid impurities from a liquid. The second is to collect a desired solid from the solution from which it was precipitated or crystallized.