Filter paper is a kind of semi-permeable paper barrier placed vertically above a liquid or air. It is widely applied to separate purified substances from liquids or gas. In science labs the filter papers can be used for extract solids from fluid and also is capable of removing sand from water.
Filter papers possess numerous properties. Its notably essential parameters include wet intensity, porosity, particle retention, compatibility and capacity of separation. What is more, two mechanisms of filter papers filtration are obvious–volume and surface. Based on volume filtration the granules can be caught in the filter paper, while applying to the surface one, particles only get stuck on the surface of the paper.
Here we mainly sort filter papers out of two types. One is utilized in most living conditions. People are seemingly more familiar with coffee filters, oil filters, fuel filters and even the tea bag is on the list.
However, another type is specialized for laboratories and sometimes named Laboratory Filters. Surprisingly, this one covers loads of subclasses such as Qualitative filter papers, Chromatography Papers, Extraction Thimbles, Glass Fiber Filters, Quartz Fiber Filter and PTFE filters.