## 2 Experimental Setup  
This study outlines a structured experimental approach to investigate and characterize materials produced using stereolithography. The aim is to address key considerations that can enhance the broader application of these materials. In SLA, a laser is directed onto a build platform, which selectively solidifies areas of a liquid photopolymer resin. As the laser traces the desired pattern, it initiates curing only in the regions exposed to its path, layer by layer, to form the final specimen. The curing process occurs in the plane of the platform and occurs layer by layer. Structures that facilitate the proper growth of the sample and its attachment to the building bed support the sample. The resolution of the printing process is dependent on two factors: the diameter of the laser used and the increment of the vertical displacement between each layer, which the user can select. In stereolithography-based printers currently on the market, the aforementioned resolution ranges from hundreds of micrometers to dozens. The material analyzed is Durable Resin from FormLabs [30]. The same company uses the Form 3 printer for fabrication. To produce the finished product, its geometry must be in the STL (Standard Tessellation Language) file format. The printing software (PreForm 3.34.3) will use this file format to define specific parameters, such as the thickness of the layer (in this study, a thickness of 50 \(\upmu\)m has been set), the orientation of printing, and the arrangement of the supports. These devices should ensure proper fixation of the samples during the process without jeopardizing their integrity, appearance, or final usability. This required a greater level of caution, since fatal errors in specimen preparation may lead to structural damage. The printing process involves storing the base material in liquid form and heating it in a tank located in the printing area above the set of lenses and mirrors. The printer also uses a high-power ultraviolet (UV) laser to polymerize the UV-curing resin layer by layer selectively. Once the printing process is complete, the sample is submerged in an isopropyl alcohol solution with a concentration of 90 percent for a time determined by the manufacturer (15 min for durable specimens) to eliminate any residual uncured resin from the sample. Subsequently, the specimen can be post-cured using a UV heating device that provides both temperature and UV radiation. This process further solidifies the material, increasing its degree of polymerization and inducing cross-linking of the polymer chains. The resin manufacturer provides specifications regarding the requisite temperature and curing time. In this instance, the radiation source with a wavelength of 405 nm and a power output of 100 W is employed to maintain a constant temperature of 60 \({}^{\circ}\)C for 60 min, based on the resin manufacturer's recommendations for optimal curing of the Durable resin. This wavelength is widely used in stereolithography due to its efficiency in initiating polymerization in common photopolymers. Compared to other wavelengths (e.g., 365 nm or 450 nm), 405 nm offers an effective balance between energy absorption by the photoinitiators and curing efficiency, leading to improved mechanical properties in the printed parts. The anisotropy characteristic of parts printed using fused deposition modeling is significantly reduced when employing the low-force stereolithography (LFS) technique. Minor differences in mechanical properties become apparent only once the elastic limit of the material is exceeded. Based on the characterization tests presented by [PERSON] et al. (2019), the material used in this study exhibits an elastic modulus of approximately E = 362.5 MPa, yield strength of \(\sigma_{y}\) = 20 MPa, and a Poisson ratio of \(\upnu\) = 0.35.