RESEARCH PAPER
Experimental Investigation of Mechanical Properties of Formlabs® Photopolymers Processed via SLA
1
Department of Machine Parts and Mechanisms, Faculty of Mechanical Engineering,, VSB – Technical University of Ostrava, Czech Republic
2
Department of Technical Studies, College of Polytechnics Jihlava, Czech Republic
3
Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, Czech Republic
4
Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB–Technical University of Ostrava, Czech Republic
5
Institute of Mechanical Science, Vilnius Gediminas Technical University, Lithuania
6
Faculty of Mechanical Engineering, Casimir Pulaski Radom University, Poland
A – Conceptualization; B – Methodology; C – Software; D – Validation; E – Formal analysis; F – Investigation; G – Resources; H – Data curation; I – Writing – original draft; J – Writing – review & editing; K – Visualization; L – Supervision; M – Project administration; N – Funding acquisition
Submission date: 2026-04-01
Final revision date: 2026-04-27
Acceptance date: 2026-09-17
Online publication date: 2026-10-05
Corresponding author
Jiří Struž
Department of Machine Parts and Mechanisms, Faculty of Mechanical Engineering,, VSB – Technical University of Ostrava, 17. listopadu 2172/15, 708 00, Ostrava - Poruba, Czech Republic
Department of Machine Parts and Mechanisms, Faculty of Mechanical Engineering,, VSB – Technical University of Ostrava, 17. listopadu 2172/15, 708 00, Ostrava - Poruba, Czech Republic
KEYWORDS
TOPICS
ABSTRACT
This study provides a mechanical characterization of commercially available SLA resins processed via Low Force Stereolithography (LFS). Multiple rigid and elastic materials with varying properties were tested under tensile, compressive, bending, and torsional loads according to ISO standards, complementing manufacturer data based on ASTM methods. Samples were printed under controlled conditions and evaluated using unified protocols. Results revealed notable differences in mechanical performance and confirmed the strong influence of post-curing, especially on tensile and bending behavior. Polynomial and bilinear regression models effectively described stress–strain responses. Surface roughness analysis showed correlations between surface quality and mechanical strength, particularly in brittle resins. These findings support better selection and optimization of SLA materials, highlighting the importance of process parameters, resin formulation, and post‑processing.
REFERENCES (39)
1.
Horn TJ, Harrysson OLA. Overview of current additive manufacturing technologies and selected applications. Science Progress 2012; 95(3): 255-282. https://doi.org/10.3184/003685....
2.
Pasricha A, Greeninger R. Exploration of 3D printing to create zero-waste sustainable fashion notions and jewelry. Fashion and Textiles 2018; 5(1): 30. https://doi.org/10.1186/s40691....
3.
Tommasi A, Maillol N, Bertinetti A, Penchev P, Bajolet J, Gili F, Pullini D, Mataix DB. Influence of surface preparation and heat treatment on mechanical behavior of hybrid aluminum parts manufactured by a combination of laser powder bed fusion and conventional manufacturing processes. Metals 2021; 11(3): 522. https://doi.org/10.3390/met110....
4.
Touris A, Turcios A, Mintz E, Pulugurtha SR, Thor P, Jolly M, Jalgaonkar U. Effect of molecular weight and hydration on the tensile properties of polyamide 12. Results in Materials 2020; 8: 100149. https://doi.org/10.1016/j.rinm....
5.
Paolucci F, Peters GWM, Govaert LE. Plasticity-controlled failure of sintered and molded polyamide 12: Influence of temperature and water absorption. Journal of Applied Polymer Science 2020; 137(14): 48525. https://doi.org/10.1002/app.48....
6.
Baschek G, Hartwig G, Zahradnik F. Effect of water absorption in polymers at low and high temperatures. Polymer 1999; 40(12): 3433-3441. https://doi.org/10.1016/S0032-....
7.
Riccio C, Civera M, Grimaldo Ruiz O, Pedullà P, Rodriguez Reinoso M, Tommasi G, Vollaro M, Burgio V, Surace C. Effects of curing on photosensitive resins in SLA additive manufacturing. Applied Mechanics 2021; 2(4): 942-955. https://doi.org/10.3390/applme....
8.
Aati S, Akram Z, Shrestha B, Patel J, Shih B, Shearston K, Ngo H, Fawzy A. Effect of post-curing light exposure time on the physico-mechanical properties and cytotoxicity of 3D-printed denture base material. Dental Materials 2022; 38(1): 57-67. https://doi.org/10.1016/j.dent....
9.
Kim YJ, Kim HN, Kim DY. A study on effects of curing and machining conditions in post-processing of SLA additive manufactured polymer. Journal of Manufacturing Processes 2024; 119: 511-519. https://doi.org/10.1016/j.jmap....
10.
Zareanshahraki F, Davenport A, Cramer N, Seubert C, Lee E, Cassoli M. Effect of post-curing process on the performance of automotive 3D-printed specimens. UV+EB Technology 2020 (19 November). https://uvebtech.com/articles/... [accessed 1 October 2026].
11.
Saini JS, Dowling L, Kennedy J, Trimble D. Investigations of the mechanical properties on different print orientations in SLA 3D printed resin. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 2020; 234(11): 2279-2293. https://doi.org/10.1177/095440....
12.
Cingesar IK, Marković MP, Vrsaljko D. Effect of post-processing conditions on polyacrylate materials used in stereolithography. Additive Manufacturing 2022; 55: 102813. https://doi.org/10.1016/j.addm....
13.
Cosmi F, Dal Maso A. A mechanical characterization of SLA 3D-printed specimens for low-budget applications. Materials Today: Proceedings 2020; 32(2): 194-201. https://doi.org/10.1016/j.matp....
14.
Dizon JRC, Espera AH, Chen Q, Advincula RC. Mechanical characterization of 3D-printed polymers. Additive Manufacturing 2018; 20: 44-67. https://doi.org/10.1016/j.addm....
15.
Dulieu-Barton JM, Fulton MC. Mechanical properties of a typical stereolithography resin. Strain 2000; 36(2): 81-87. https://doi.org/10.1111/j.1475....
16.
Hague R, Mansour S, Saleh N, Harris R. Materials analysis of stereolithography resins for use in rapid manufacturing. Journal of Materials Science 2004; 39(7): 2457-2464. https://doi.org/10.1023/B:JMSC....
17.
Chockalingam K, Jawahar N, Chandrasekar U, Ramanathan KN. Establishment of process model for part strength in stereolithography. Journal of Materials Processing Technology 2008; 208(1-3): 348-365. https://doi.org/10.1016/j.jmat....
18.
Bencharit S, Hunsaker CA, Brenes CB. In vitro analysis of bonding and wear properties of 3D printed denture tooth materials. Cureus 2024; 16(7): e65388. https://doi.org/10.7759/cureus....
19.
Revilla-León M, Cascos-Sánchez R, Zeitler JM, Barmak AB, Kois JC, Gómez-Polo M. Influence of print orientation and wet-dry storage time on the intaglio accuracy of additively manufactured occlusal devices. The Journal of Prosthetic Dentistry 2024; 131(6): 1226-1234. https://doi.org/10.1016/j.pros....
20.
Alharbi S, Alshabib A, Algamaiah H, Aldosari M, Alayad A. Influence of post-printing polymerization time on flexural strength and microhardness of 3D printed resin composite. Coatings 2025; 15(2): 230. https://doi.org/10.3390/coatin....
21.
Miedzińska D, Gieleta R, Popławski A. Experimental study on influence of curing time on strength behavior of SLA-printed samples loaded with different strain rates. Materials 2020; 13(24): 5825. https://doi.org/10.3390/ma1324....
22.
Formlabs. Form Wash/Form Wash L time settings. https://support.formlabs.com/s...; 2025 [accessed 29 August 2025].
23.
Formlabs. Form Cure (1st Generation) time and temperature settings. https://support.formlabs.com/s...; 2025 [accessed 29 August 2025].
24.
ISO 527-2:2012. Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion plastics. Geneva: International Organization for Standardization; 2012.
25.
ISO 604:2002. Plastics — Determination of compressive properties. Geneva: International Organization for Standardization; 2002.
26.
ISO 178:2019. Plastics — Determination of flexural properties. Geneva: International Organization for Standardization; 2019.
28.
Neoh SP, Khantachawana A, Santiwong P, Chintavalakorn R, Srikhirin T. Effect of post-processing on the surface, optical, mechanical, and dimensional properties of 3D-printed orthodontic clear retainers. Clinical Oral Investigations 2025; 29(1): 48. https://doi.org/10.1007/s00784....
29.
Fouda S, Ji W, Gad MM, AlGhamdi MA, Rohr N. Flexural strength and surface properties of 3D-printed denture base resins—Effect of build angle, layer thickness and aging. Materials 2025; 18(4): 913. https://doi.org/10.3390/ma1804....
30.
Stoev YY, Uzunov TT, Stoyanova NS, Grozdanova-Uzunova RG, Kosturkov DN, Taneva IK. Mechanical properties of materials for 3D printed orthodontic retainers. Folia Medica 2023; 65(6): 986-992. https://doi.org/10.3897/folmed....
31.
Storck JL, Ehrmann G, Uthoff J, Diestelhorst E, Błachowicz T, Ehrmann A. Investigating inexpensive polymeric 3D printed materials under extreme thermal conditions. Materials Futures 2022; 1(1): 015001. https://doi.org/10.1088/2752-5....
32.
Sadaghian H, Khalilzadehtabrizi S, Farzam M, Dehghan S. Behavior of 3D-printed polymers under monotonic torsion – A database of 15 different materials. Additive Manufacturing 2022; 60: 103251. https://doi.org/10.1016/j.addm....
33.
Shahzadi L, Maya F, Breadmore MC, Thickett SC. Functional materials for DLP-SLA 3D printing using thiol–acrylate chemistry: Resin design and postprint applications. ACS Applied Polymer Materials 2022; 4(5): 3896-3907. https://doi.org/10.1021/acsapm....
34.
Sharma N, Cao S, Msallem B, Kunz C, Brantner P, Honigmann P, Thieringer FM. Effects of steam sterilization on 3D printed biocompatible resin materials for surgical guides — an accuracy assessment study. Journal of Clinical Medicine 2020; 9(5): 1506. https://doi.org/10.3390/jcm905....
35.
Borrello J, Nasser P, Iatridis JC, Costa KD. 3D printing a mechanically-tunable acrylate resin on a commercial DLP-SLA printer. Additive Manufacturing 2018; 23: 374-380. https://doi.org/10.1016/j.addm....
36.
Gad MM, Fouda SM. Factors affecting flexural strength of 3D-printed resins: A systematic review. Journal of Prosthodontics 2023; 32(S1): 96-110. https://doi.org/10.1111/jopr.1....
37.
Saini RS, Gurumurthy V, Quadri SA, Bavabeedu SS, Abdelaziz KM, Okshah A, Alshadidi AAF, Yessayan L, Mosaddad SA, Heboyan A. The flexural strength of 3D-printed provisional restorations fabricated with different resins: a systematic review and meta-analysis. BMC Oral Health 2024; 24(1): 66. https://doi.org/10.1186/s12903....
38.
Cotabarren I, Palla CA, McCue CT, Hart AJ. An assessment of the dimensional accuracy and geometry-resolution limit of desktop stereolithography using response surface methodology. Rapid Prototyping Journal 2019; 25(7): 1169-1186. https://doi.org/10.1108/RPJ-03....
39.
Dave HK, Karumuri RT, Prajapati AR, Rajpurohit SR. Specific energy absorption during compression testing of ABS and FPU parts fabricated using LCD-SLA based 3D printer. Rapid Prototyping Journal 2022; 28(8): 1530-1540. https://doi.org/10.1108/RPJ-04....
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