BACKGROUND: The aim of this in-vitro study is to investigate the effect of post-curing time and units on the degree of conversion (DC), microhardness (VHN) and staining susceptibility (∆E METHODS: A total of 180 disc-shaped samples (10*10*2 mm), 60 for each experiment, from the tested materials (30 SCT, 30 VSP) were printed on 3D printer. Half of the samples were post-cured in LC-3DPrint Box and the other half in Phrozen Cure V2 and were divided into 3 subgroups according to post-curing time of 5, 10 and 30 min (n = 5). The DC of the samples was determined using a Fourier transform infrared spectrometer. The VHN values were measured with a Vickers hardness tester. The color of the samples was initially measured using a spectrophotometer and then again after one month of staining in coffee. The ∆E RESULTS: While DC and VHN of the tested materials increased in parallel with the post-curing time, ∆E CONCLUSION: The study demonstrated that extending the post-curing time led to improvements in the degree of conversion and microhardness, while simultaneously reducing the stainability of the materials tested. Additionally, the type of post-curing unit used had a significant impact on these results, further highlighting the importance of both curing time and equipment in optimizing material properties.