Rasin does not cure

i am printing a hollow model with peopoly rasin and it does not cure after 48h under uv lamp!

Requires 405nm wavelength UV light irradiation

Heat also helps the curing process. Also, be sure your resin is not compromised with contaminants. And of course, using an opaque resin will prevent the UV light from penetrating the structure of the printed part. Be sure to have enough laser power for a full cure if you cannot post cure the model.