[en] The results of background characteristics and sensitivities of various types of polyallyldiglycolcarbonate (PADC) are presented and compared with each other. This study is within the framework of the collaboration programme organized by EURADOS-CENDOS. The commercially available polymeric detectors known as CR-39 and extensively used for neutron dosimetry were supplied by five different manufacturers. For each type/thickness of material, two or three sheets were sampled. Each sheet divided into six equal areas and from each, 4 background and 2 sensitivity detectors were taken and the total of 512 samples were tested. The sensitivity was determined for normally incident bare ²⁵²Cf neutrons. The samples were etched with the four-step electrochemical etching and a post chemical etch treatment. The highest sensitivity of 0.2 cm^-2 μSv^-1 with the lowest average background of about 150 μSv for a single sheet was found. The minimum detectable dose equivalent (MDDE) taken as three standard deviations of background was found to be 153 μSv. (author) 4 figs., 4 tabs., 12 refs