Moreover, the size of the unit cell of the FSS with an operating frequency in the lower part of the THz region (sub-millimeter/millimeter wavelength) is a few hundreds of microns, and the fact is that it is usually not necessary to use such a costly fabrication technique with sub-\(\upmu\)m resolution for prototyping THz FSSs [11]. As an alternative, a new manufacturing method has emerged, named additive manufacturing, which can be used to fabricate different THz FSS structures with unit cell sizes measuring a few hundreds of microns. This technique is a low-cost and high-speed process and allows printing on a very large scale. It is also environmentally beneficial as it produces less raw material waste than conventional methods [25; 26]. It is striking that the high precision of additive manufacturing technique, i.e., printable electronics even allows their own non-contact inline inspection by printing THz FSS [27; 28]. There have already been a few reports on THz devices made via additive manufacturing, including vortex phase plates [27], diffractive THz lenses [29], gradient-refractive-index lenses [30], band-pass filters [31; 32], etc. Additionally, 3D printing has been used to create a holographic metasurface antenna that operates in the GHz range [33]. Furthermore, printed flexible THz metamaterials and metasurfaces have been reported over the past few years. For instance, a THz metamaterial based on electrohydrodynamic jet printing [34] and a printed metallic checkerboard based on flexographic printing [11] have been reported. However, in these demonstrations, it should be noted that none of these devices are reconfigurable or tunable. To do so, mechanically tunable terahertz metamaterials based on a flexible PDMS substrate have been demonstrated by [PERSON] et al. [35], but require a standard photolithography fabrication method. To the best of our knowledge, no reports on the demonstration of a reconfigurable printed THz FSS exist in the literature to date. To achieve this, the Moire pattern interference scheme represents an interesting and simple way to realize tunability from printed structures. Recent examples of Moire interference have been used for electromagnetic re-configuration at the atomic scale [36], in a tunable metasurface lens [37], on a hyperbolic Moire metasurface [38], and to control the transmission amplitude of electromagnetic waves in the GHz frequency range [22]. In the present work, we demonstrate the design, fabrication, and analysis of the filtering properties of THz FSSs produced by two different additive manufacturing approaches, i.e., printable electronics (PE) and 3D printing. The PE-based FSS was made from a silver nanoparticle ink and printed on a PET substrate, while the 3D-printed FSS was fabricated using aluminum foil. In the next step, FSSs are used to develop a reconfigurable THz FSS. To that end, the Moire FSS was implemented using two identical FSSs based on a triangular air hole array. The proposed THz Moire-printed FSS can be controlled by simply adjusting the rotation angle between two identical structures. In agreement with our simulations, the experimental results show a decrease in transmission from 90% to 53% at a center frequency of 0.22 THz in the case of the PE-based Moire FSS, covering a spectral width of \(\sim\)250 GHz at full width at half maximum (FWHM).