Cylindrical type ceramic filers, that is 60 O.D$ imes$10t$ imes$600L and 60 O.D$ imes$10t$ imes$1,000L were manufactured by vacuum forming processes using ceramic ray materials. For cylindrical type ceramic filters, porosity and bulk density were measured for, 80 to 90% and 0.3 to 0.4 g/㎤, respectively at uniform pore size of 41 to 45${mu}{ extrm}{m}$. Bench scale candle filters (60$psi$ $ imes$10t$ imes$600L) were tested using different dusts collected from many industries including chemical processing, glass processing and metal manufacturing pants. Collection efficiencies found out to range from 99.87% to 99.90%, while resistance coefficients from 1.1$ imes$10(sup)11/$m^2$ to 1.7$ imes$10(sup)11/$m^2$ . Full scale low density ceramic filters (60$psi$ $ imes$10t$ imes$1,000L) were also tested at 1 atm, $600^{circ}C$ to reveal the filtration efficiency, conditioning, and resistance coefficients using two different types of dust as chemical processing and metal refined processing. Darcys law resistance coefficients were measured to range 1.44$ imes$10(sup)11/$m^2$ to 2.74$ imes$10(sup)11/$m^2$, and collection efficiencies on the range 99.84 to 99.96%, Finally, results of long term performance test showed that filters were conditioned after 170hrs. Experimental conditions for effective filtration were examined under the condition 10 cm/sec face velocity, 3kg/$ extrm{cm}^2$ pulsing pressure, 5 min filtration cycle, and 300msec pulse opening time.