I performed a characterization of a half-industrial filter with a series of experimental sequences. Two parameters changed the pressure and the filter medium. Both parameters have three different points: 0.5, 1 and 1.5 bar, and linen, plastic and paper filters. The measurements were performed uniformly with 3 m / m% CaCO3 until 1.5 l filtrate volume. During the test, the measurement of the low pressure measurements takes up to 4-5 hours for each case, while the time of the measurement is 2-3 hours at higher pressures.