Sintered glassware is used for the filtration of liquids and gases in the laboratory. It incorporates a porous glass disc as a filter media which is non corrosive and reusable. It is also used for gas washing, dispersion and absorption. Sintered disc is manufactured by crushing Borosil brand glass, powdering, cleaning, separating into various mesh sizes and then fusing together in the form of a disc. The sintered disc is graded into 5 grades - G1, G2, G3, G4, and G5. The grades are classified by maximum pore size which is obtained by measuring ad pressure at which the first air bubble breaks away from filter under certain conditions. The pressure differential is then used to calculate the equivalent capillary diameters in microns. The desired pore size is obtained by suitably controlling the grain size, firing time and temperature and the thickness of the disc. Each disc is tested and graded individually.
See Other Sintered Ware 
