## 1 Introduction
The dominant shielding characteristic of absorption other than that of reflection for metals render ICPs more promising materials in applications requiring not only high EMR shielding effectiveness but also shielding by absorption, such as in stealth technology. The studies of textiles coated with conductive polymers [12; 13] show that they are not highly effective as EMR shielding materials owing to their medium-level conductivity and therefore large skin depth. Textile fabrics with ICPs coatings mostly demonstrate shielding effectiveness (SE) not exceeding 20 dB in the microwave frequency range. Combine with fact that coatings are naturally thin, they cannot act as effective reflective barriers to EMR radiation. However, because they are highly absorptive in the microwave region, microwave-absorbing composite materials can be designed in conjunction with textiles. The past works concerning EMR shielding with ICPs on textile fabrics are focused mainly on polyaniline (PANI) and polypyrrole (PPY) applications [7; 10; 13; 14; 15; 16]. However, increasingly appears publications about application of other ICPs-PEDOT, for development of EMR shielding textiles [8]. The conjugated polymer system--poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS) was chosen for this study because of its processability, stable electrical conductivity and low price in comparison with other ICPs. Also, PEDOT:PSS has other merits. For example, hydrogel particles offer excellent processing properties for the production of thin, transparent, conducting films [17]; coating with PEDOT:PSS does not affect the mechanical properties of the substrate and allows for them to be used as flexible and deformable substrates [18]. Whereas, due to the black color of polyaniline or polypyrrole, these ICPs are unlikely for developing conductive camouflage materials as the colour of these materials in VIS range should remain unchanged after coating. The most common techniques [8] for applying ICPs on textiles are solution coating [19], in-situ polymerization [20], polymerization in supercritical fluid, electrochemical polymerization [21], electrostatic spinning [22], coating by screen printing [23], inkjet printing [24], or knife-over-roll technology [25]. The electrical properties of the conducting polymer-coated fabrics are influenced by various factors such as the concentration of reactants, deposit and thickness of the polymer coating, nature of the substrate surface, binding strength of coating to the textile surface, etc. [25; 26]. Coating usually does not change the flexibility of the fabrics if it is applied in very thin layer, low mass and closed fabric structures. Most of the commercially available EMR shielding fabrics are produced by coating technologies and have very homogeneous and closed structures thus exhibiting satisfactory EMR shielding capabilities and isotropic behaviour [27]. Requirements for ideal EMR shielding textile or RAM textile fabric are not only high enough relevant EMR shielding effectiveness or absorption, over wide frequency range, but also stable electrical properties, resistance to washing, withstanding other impacts, which appear during the wear. However, current coating technologies do not provide sufficiently substantial bonding between textile substrate and ICPs layer. That leads to loss of conductivity of coated textile, caused by poor adhesion, during wear or after washing procedures. So, the resistance performance of fabrics coated with ICPs polymers needs to be improved. Most of the conductive coatings under studies are obtained by solution coating or in-situ polymerization and most commonly the materials so produced are used in development of electronic textiles, sensor [28; 29]. However, the research into the development of the RAM textile and especially applying coating by screen printing or knife-over-roll technology, which allows the finish to be applied only on one surface/side of the material investigated, is not analyzed.