All SLA printers cure resin just enough to form the model, but they still require post-curing in order to harden the outside surface. This post-curing process hardens the model and allows the model to be safe to touch and removes the sticky or tacky feel as they harden.
The resin can be post-cured at any wavelength between 225nm and 420nm but we recommend staying as close to 405nm as possible, which is the same wavelength that the Lotus EZ uses, along with many other LCD SLA 3D Printers. This wavelength especially important for our clear resin. Wavelengths outside of 405nm can a yellowing effect in the finished model.
Length of time spent post-curing is dependent upon the strength of the light source, the thickness of the walls of your model and its overall size. A good indicator of sufficient post-curing is that it loses the tacky feel (remember to still wear gloves throughout this process!).
If you have strong enough sunlight in your location, it is also an option to simply allow the model to sit in the sun. The length of time required to cure by direct sunlight will of course be determined by the strength of the sunlight and again, the thickness of the walls on your model. For example, winter sunlight will take a significantly longer period than in summer months.